TY - CHAP A1 - Shelkan, Aleksander A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir A1 - Seibold, Götz ED - Kaplan, Michael D. T1 - Free and spin-polaron states in high-Tc superconductor T2 - Proceedings of the NATO Advanced Research Workshop on Colossal Magnetoresistance and Vibronic Interactions and the XVth International Jahn-Teller Symposium on Vibronic Interactions in Crystals and Molecules, Boston, August 16 - 22, 2000 Y1 - 2001 SN - 1-402-00044-8 SP - 349 EP - 356 PB - Kluwer CY - Dordrecht [u.a.] ER - TY - GEN A1 - Seibold, Götz A1 - Castellani, Claudio A1 - Di Castro, Carlo T1 - Fermi surface and electronic structure of incommensurate charge-density-wave systems Y1 - 2000 ER - TY - GEN A1 - Seibold, Götz A1 - Grilli, Marco T1 - Influence of incommensurate dynamic charge-density wave scattering on the line shape of supersonducting high-Tc cuprates T2 - Physical review : B Y1 - 2001 SN - 1098-0121 IS - 22 SP - S. 224505 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Time-dependent Gutzwiller approximation for the Hubbard Model Y1 - 2001 ER - TY - JOUR A1 - Seibold, Götz A1 - Varlamov, Sergej T1 - Effective particle-particle interaction in incommensurable CDW systems Y1 - 2001 ER - TY - GEN A1 - Günther, Falk A1 - Seibold, Götz T1 - Elektronische Inhomogenitäten in Hochtemperatursupraleitern T2 - Forum der Forschung Y1 - 2005 SN - 0947-6989 VL - 9 IS - 18 SP - 41 EP - 48 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José A1 - Coldea, Radu T1 - Sum rules and missing spectral weight in magnetic neutron scattering in the cuprates Y1 - 2005 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - The unrestricted Gutzwiller+RPA approach and its application to stripes in cuprates Y1 - 2005 ER - TY - JOUR A1 - Guenther, Falk A1 - Seibold, Götz A1 - Lorenzana, José T1 - Quantum Lifshitz point in the infinite dimensional Hubbard model Y1 - 2007 ER - TY - CHAP A1 - Bill, Andreas A1 - Hizhnyakov, Vladimir A1 - Seibold, Götz A1 - Sigmund, Ernst ED - Bussmann-Holder, Annette T1 - Electronic Inhomogeneities and Pairing from Unscreened Interactions in High-Tc Superconductors T2 - High-Tc Superconductors and Related Transition Metal Oxides Y1 - 2007 SN - 978-3-540-71022-6 SP - 143 EP - 156 PB - Springer CY - Berlin [u.a.] ER - TY - JOUR A1 - Müller, Sebastian A1 - Seibold, Götz A1 - Schmeißer, Dieter ED - Vierhaus, Heinrich Theodor T1 - Preparation and Characterization of TiO2 Thin Films and Cr and Co Doped TiO2 Thin Films Y1 - 2007 ER - TY - JOUR A1 - Seibold, Götz A1 - Becca, Federico A1 - Lorenzana, José T1 - Time dependent Gutzwiller theory of pairing fluctuations in the Hubbard model JF - Physical Review B KW - Correlated electrons KW - Hubbard mode KW - Pairing correlations Y1 - 2008 SN - 0556-2805 VL - 78 SP - 045114 ER - TY - JOUR A1 - Seibold, Götz T1 - Slave-boson based configuration-interaction approach for the Hubbard model JF - Physical Review B Y1 - 2008 SN - 1550-235X VL - 77 IS - 23 SP - 235109 ER - TY - GEN A1 - Di Ciolo, A. A1 - Lorenzana, José A1 - Grilli, Marco A1 - Seibold, Götz T1 - Charge instabilities and electron-phonon interaction in the Hubbard-Holstein model T2 - Physical Review B KW - strongly correlated systems Y1 - 2009 SN - 1550-235X VL - 79 SP - 085101 ER - TY - GEN A1 - Grilli, Marco A1 - Seibold, Götz A1 - Di Ciolo, A. A1 - Lorenzana, José T1 - Fermi surface dichotomy in systems with fluctuating order T2 - Physical Review B Y1 - 2009 SN - 1550-235X VL - 79 SP - 125111 ER - TY - GEN A1 - Seibold, Götz A1 - Lorenzana, José T1 - Calculation of incommensurability and spin excitations of diagonal stripes in underdoped lanthanum cuprates T2 - Physical Review B Y1 - 2009 SN - 1550-235X VL - 80 IS - 1 SP - 012509 ER - TY - JOUR A1 - Schmeißer, Dieter A1 - Seibold, Götz A1 - Reif, Jürgen T1 - Nano-scaled Dielectric Barriers (NanoDieB) for CMOS compatible Si-technologies JF - Forum der Forschung KW - nano-scaled KW - dielectric KW - CMOS Y1 - 2006 SN - 0947-6989 IS - 19 SP - 131 EP - 136 ER - TY - GEN A1 - Günther, Falk A1 - Seibold, Götz A1 - Lorenzana, José T1 - Stability of ferromagnetism within the time-dependent Gutzwiller approximation for the Hubbard model Y1 - 2011 ER - TY - GEN A1 - Seibold, Götz A1 - Grilli, Marco A1 - Lorenzana, José T1 - Dynamical charge and spin density wave scattering in cuprate superconductors Y1 - 2010 ER - TY - GEN A1 - Ugenti, S. A1 - Cini, M. A1 - Seibold, Götz A1 - Lorenzana, José A1 - Perfetto, E. A1 - Stefanucci, G. T1 - Particle-particle response function as a probe for electronic correlations in the p-d Hubbard model Y1 - 2010 ER - TY - GEN A1 - Oelsen, E. von A1 - Di Ciolo, A. A1 - Lorenzana, José A1 - Seibold, Götz A1 - Grilli, Marco T1 - Phonon renormalization from local and transitive electron-latticecouplings in strongly correlated systems Y1 - 2010 ER - TY - GEN A1 - Markiewicz, Richard S. A1 - Lorenzana, José A1 - Seibold, Götz T1 - Gutzwiller magnetic phase diagram of the undoped $ t- t' -U $ Hubbard model Y1 - 2010 ER - TY - GEN A1 - Markiewicz, Richard S. A1 - Lorenzana, José A1 - Seibold, Götz A1 - Bansil, Arun T1 - Gutzwiller magnetic phase diagram of the cuprates Y1 - 2010 ER - TY - GEN A1 - Seibold, Götz A1 - Grilli, Marco A1 - Lorenzana, José T1 - Model of Quasiparticles Coupled to a Frequency-Dependent Charge-DensityWave Order Parameter in Cuprate Superconductors Y1 - 2009 ER - TY - GEN A1 - Seibold, Götz A1 - Lorenzana, José T1 - Diagonal stripes in the spin glass phase of cuprates T2 - Physica : C Y1 - 2009 N1 - Proceedings of the 9th International Conference on Materials andMechanisms of Superconductivity VL - 470 IS - Suppl. 1 SP - 245 EP - 246 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz A1 - Ortix, C. A1 - Grilli, Marco T1 - Competing orders in FeAs layers Y1 - 2008 ER - TY - JOUR A1 - Seibold, Götz A1 - Becca, Federico A1 - Lorenzana, José T1 - Theory of antibound states in partially filled narrow band systems Y1 - 2008 ER - TY - JOUR A1 - Seibold, Götz A1 - Grilli, Marco A1 - Lorenzana, José T1 - Checkerboard and stripe inhomogeneities in cuprates JF - Physical review B Y1 - 2007 SN - 1550-235X VL - 75 IS - 10 SP - 10050(R) ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Gutzwiller+RPA Theory for Magnetic fluctuations from Stripes in Cuprates Y1 - 2007 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Magnetic excitations in the stripe phase of the Hubbard model Y1 - 2007 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz T1 - Unified description of charge and spin excitations of stripes in cuprates Y1 - 2007 ER - TY - JOUR A1 - Di Ciolo, A. A1 - Lorenzana, José A1 - Seibold, Götz A1 - Grilli, Marco T1 - Paramagnetic stripes in cuprates: charge inhomogeneity coexisting with large Fermi surfaces Y1 - 2007 ER - TY - JOUR A1 - Günther, Falk A1 - Seibold, Götz T1 - Time-dependent Gutzwiller theory of pair fluctuations in the Hubbard model Y1 - 2007 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Doping dependence of spin excitations in the stripe phase of high-Tc superconductors Y1 - 2006 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz T1 - Dynamic properties of inhomogeneous states in cuprates Y1 - 2006 ER - TY - JOUR A1 - Eremin, M. A1 - Varlamov, Sergej A1 - Eremenin, I. A1 - Seibold, Götz T1 - Influence of incommensurability on SDW and CDW amplitudes in underdoped cuprates Y1 - 2000 ER - TY - GEN A1 - Seibold, Götz A1 - Becca, Federico A1 - Bucci, F. A1 - Castellani, Claudio A1 - Di Castro, Carlo A1 - Grilli, Marco T1 - Spectral properties of incommensurate charge-density wave systems Y1 - 2000 ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir T1 - Spin-Polaron Formation and Phase Separation Y1 - 1996 ER - TY - JOUR A1 - Seibold, Götz A1 - Seidel, J. A1 - Sigmund, Ernst T1 - Inhomogeneous Spin Structures in High-Tc Cuprates Y1 - 1996 ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Gutzwiller and Slave-Boson Methods for Intersite Coulomb Interactions Y1 - 1996 ER - TY - JOUR A1 - Bill, Andreas A1 - Hizhnyakov, Vladimir A1 - Nevedrov, D. A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Electronic inhomogeneities, electron-lattice and pairinginteractions in high-Tc superconductors Y1 - 1997 ER - TY - GEN A1 - Seibold, Götz A1 - Castellani, Claudio A1 - Di Castro, Carlo A1 - Grilli, Marco T1 - Striped phases in the two-dimensional Hubbard model with long-rangeCoulomb interaction Y1 - 1998 ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir T1 - Unrestricted slave-boson mean-field approximation for the two-dimensional Hubbard model JF - Physical review Y1 - 1998 SN - 0556-2805 VL - 57 IS - 12 SP - 6937 EP - 6942 ER - TY - JOUR A1 - Feinberg, D. A1 - Germain, P. A1 - Grilli, Marco A1 - Seibold, Götz T1 - Joint superexchange - Jahn-Teller mechanism for A-typeantiferromagnetism in LaMnO3 Y1 - 1998 ER - TY - GEN A1 - Seibold, Götz T1 - Vortex, skyrmion and elliptical domain wall textures in thetwo-dimensional Hubbard model T2 - Physical review B Y1 - 1998 SN - 1550-235X VL - 58 IS - 23 SP - 15520 EP - 15527 ER - TY - JOUR A1 - Seibold, Götz A1 - Varlamov, Sergej T1 - Relationship between incommensurability and superconductivity in Peierls distorted charge-density-wave systems JF - Physical review : B Y1 - 1999 SN - 0556-2805 VL - 60 SP - 13056 ER - TY - GEN A1 - Seibold, Götz A1 - Castellani, Claudio A1 - Di Castro, Carlo A1 - Grilli, Marco T1 - Fermi surface and photoemission lineshape of incommensurate CDW systems Y1 - 2000 ER - TY - JOUR A1 - Ruckh, R. A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Influence of quantum fluctuations on solitary-wave acoustic polaron motion Y1 - 1993 ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir T1 - Spin-cluster states in CuO2 planes JF - Physical review B Y1 - 1993 SN - 0556-2805 VL - 48 IS - 10 SP - 7537 EP - 7544 ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Metal-insulator transition in doped bismuthate superconductors Y1 - 1993 ER - TY - JOUR A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir A1 - Seibold, Götz T1 - Phase-Separation in High-Tc Superconductors JF - Physica C : Superconductivity Y1 - 1994 SN - 0921-4534 VL - Vol. 235–240 IS - 1 SP - 253 EP - 256 ER - TY - JOUR A1 - Letz, M. A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Percolative Phase-Separation-Mean Field Calculations of Spin-Polarized States in CuO2 Planes Y1 - 1994 ER - TY - JOUR A1 - Seibold, Götz A1 - Letz, M. A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir T1 - Mean-Field Theories of Spin-Cluster States in copper oxide planes Y1 - 1994 ER - TY - JOUR A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir A1 - Seibold, Götz T1 - Electronic Phase Separation in High-Tc Superconductors Y1 - 1994 ER - TY - JOUR A1 - Sigmund, Ernst A1 - Seibold, Götz A1 - Bill, Andreas A1 - Wulf, Ulrich A1 - Isenmann, G. A1 - Essl, W. T1 - Dynamische Eigenschaften von Festkörpern und Molekularen Strukturen Y1 - 1995 ER - TY - THES A1 - Seibold, Götz T1 - Spin-polarisierte Quasiteilchen in der Hochtemperatursupraleitung Y1 - 1995 PB - Aachen : Shaker ER - TY - JOUR A1 - Seibold, Götz A1 - Sigmund, Ernst T1 - Differences between one and multiband Hubbard models Y1 - 1995 ER - TY - JOUR A1 - Seibold, Götz A1 - Varlamov, Sergej T1 - Spectral properties of incommensurate CDW scattering in cuprates Y1 - 2003 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz T1 - Metallic mean-field stripes, incommensurability and chemicalpotential in cuprates Y1 - 2002 ER - TY - JOUR A1 - Varlamov, Sergej A1 - Seibold, Götz T1 - Effective interactions in the stripe state of the two-dimensional Hubbard model Y1 - 2002 ER - TY - JOUR A1 - Varlamov, Sergej A1 - Seibold, Götz T1 - Influence of the pseudogap on the superconductivity-inducedphonon renormalization in high-Tc superconductors Y1 - 2002 ER - TY - GEN A1 - Seibold, Götz A1 - Varlamov, Sergej T1 - Effect of incommensurate charge-density wave scattering on theelectronic structure of high-Tc cuprates (I) T2 - Journal of Superconductivity Y1 - 2002 SN - 0896-1107 VL - 15 IS - 5 SP - 387 EP - 388 ER - TY - GEN A1 - Seibold, Götz A1 - Varlamov, Sergej T1 - Effect of incommensurate charge-density wave scattering on theelectronic structure of high-Tc cuprates (II) T2 - Journal of Superconductivity Y1 - 2002 SN - 0896-1107 VL - 15 IS - 6 SP - 505 EP - 506 ER - TY - JOUR A1 - Seibold, Götz T1 - Grundlagen und Anwendungen der Supraleitung JF - Unterrichtsblätter Deutsche Telekom Y1 - 2002 SN - 0949-3387 VL - 55 SP - S. 240 ER - TY - CHAP A1 - Seibold, Götz A1 - Castellani, Claudio A1 - Di Castro, Carlo A1 - Grilli, Marco ED - Bianconi, Antonio ED - Saini, Naurang L. T1 - Domain wall structures in the two-dimensional Hubbard modelwith long-range Coulomb interaction T2 - Stripes and Related Phenomena Y1 - 2000 SN - 0-306-46419-5 U6 - https://doi.org/10.1007/0-306-47100-0_18 SP - 151 EP - 157 PB - Kluwer Academic Plenum CY - New York ER - TY - GEN A1 - Seibold, Götz A1 - Castellani, Claudio A1 - Di Castro, Carlo A1 - Grilli, Marco ED - Barnes, Stewart E. T1 - Role of the long-range Coulomb interaction on the formation of striped phases in the two-dimensional Hubbard model T2 - High temperature superconductivity, Coral Gables, Florida, January 1999 Y1 - 1999 SN - 1-56396-880-0 U6 - https://doi.org/10.1063/1.59651 PB - AIP Publishing CY - Melville, New York ER - TY - CHAP A1 - Hizhnyakov, Vladimir A1 - Sigmund, Ernst A1 - Seibold, Götz T1 - Polaron Formation and Percolative Phase Separation T2 - Phase Separation in Cuprate Superconductors Y1 - 1994 SN - 3-540-57681-9 SP - 50 EP - 65 PB - Springer CY - Berlin [u.a.] ER - TY - JOUR A1 - Seibold, Götz A1 - Grilli, Marco T1 - Theory of isotope dependence of photoemission spectra ofhigh-Tc superconducting cuprates Y1 - 2005 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Magnetic fluctuations of stripes in the high temperature cuprate superconductors Y1 - 2005 ER - TY - JOUR A1 - Seibold, Götz A1 - Lorenzana, José T1 - Stability of metallic stripes in the extended one-band Hubbard model Y1 - 2004 ER - TY - JOUR A1 - Seibold, Götz A1 - Becca, Federico A1 - Rubin, P. A1 - Lorenzana, José T1 - Time-dependent Gutzwiller theory of magnetic excitations in the Hubbard model Y1 - 2004 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz T1 - Dynamical and statical properties of stripes in cuprates Y1 - 2004 ER - TY - JOUR A1 - Varlamov, Sergej A1 - Seibold, Götz T1 - Temperature dependence of the collective mode and its influence on theband splitting in bilayer cuprates Y1 - 2003 ER - TY - JOUR A1 - Lorenzana, José A1 - Seibold, Götz T1 - Dynamics of metallic stripes in cuprates Y1 - 2003 ER - TY - JOUR A1 - Seibold, Götz A1 - Becca, Federico A1 - Lorenzana, José T1 - Inhomogeneous Gutzwiller approximation with random phase fluctuationsfor the Hubbard model Y1 - 2003 ER - TY - GEN A1 - Schmeißer, Dieter A1 - Schmidt, Stephan A1 - Seibold, Götz A1 - Cherkashinin, Gennady A1 - Jaegermann, Wolfram T1 - Localized Gap States in LiCoO2 and their Influence on the Transport Properties in Li-Ion Batteries T2 - ECS Transactions Y1 - 2010 SN - 1938-5862 VL - 25 IS - 35 SP - 37 EP - 45 ER - TY - GEN A1 - Oelsen, E. von A1 - Seibold, Götz A1 - Bünemann, Jörg T1 - The time-dependent Gutzwiller theory for multi-band Hubbard models T2 - New Journal of Physics Y1 - 2011 SN - 1367-2630 VL - 13 SP - 113031-01 EP - 113031-42 ER - TY - GEN A1 - Mondal, Mintu A1 - Kumar, Sanjeev A1 - Chand, Madhavi A1 - Kamlapure, Anand A1 - Saraswat, Garima A1 - Seibold, Götz A1 - Benfatto, Lara A1 - Raychaudhuri, Pratap T1 - Role of the Vortex-Core Energy on the Berezinskii-Kosterlitz-Thouless Transition in Thin Films of NbN Y1 - 2011 U6 - https://doi.org/10.1103/PhysRevLett.107.217003 ER - TY - GEN A1 - Oelsen, E. von A1 - Seibold, Götz A1 - Bünemann, Jörg T1 - Time-Dependent Gutzwiller Theory for Multiband Hubbard Models T2 - Physical Review Letters Y1 - 2011 SN - 1079-7114 VL - 107 IS - 7 SP - 076402-01 EP - 076402-04 ER - TY - GEN A1 - Seibold, Götz A1 - Markiewicz, Richard S. A1 - Lorenzana, José T1 - Spin canting as a result of the competition between stripesand spirals in cuprates Y1 - 2011 ER - TY - GEN A1 - Markiewicz, Richard S. A1 - Lorenzana, José A1 - Seibold, Götz A1 - Bansil, Arun T1 - Competing phases on the cuprates: Charge vs spin order Y1 - 2011 ER - TY - GEN A1 - Seibold, Götz A1 - Grilli, Marco A1 - Lorenzana, José T1 - Influence of correlations on transitive electron-phonon couplings in cuprate superconductors Y1 - 2011 ER - TY - GEN A1 - Seibold, Götz A1 - Grilli, Marco A1 - Lorenzana, A. T1 - Dynamics of Electronic Inhomogeneities in Cuprates Y1 - 2011 ER - TY - JOUR A1 - Seibold, Götz A1 - Grilli, Marco T1 - Influence of incommensurate dynamic charge-density wave scatteringon the line shape of superconducting high-Tc cuprates JF - Physical Review B Y1 - 2001 SN - 1550-235X VL - 63 IS - 22 SP - 224505 ER - TY - CHAP A1 - Sigmund, Ernst A1 - Hizhnyakov, Vladimir A1 - Seibold, Götz T1 - Percolative Phase Separation and High-Tc superconductivity T2 - Proceedings of the Workshop on Phase Separation in Cuprate Semiconductors, Erice, Italy, 1992 Y1 - 1993 SN - 981-02-1274-7 SP - 46 EP - 66 PB - World Scientific CY - Singapore [u.a.] ER - TY - GEN A1 - Bazart, Cécile A1 - Bonein, Aurélie A1 - Hokamp, Sascha A1 - Seibold, Götz T1 - Bahavioural Economics and Tax Evasion: Calibrating an Agent-based Econophysics Model with Experimental Tax Compliance Data T2 - Journal of Tax Administration Y1 - 2016 UR - http://jota.website/article/view/74 VL - 2 IS - 1 SP - 126 EP - 144 ER - TY - GEN A1 - Markiewicz, Richard S. A1 - Lorenzana, José A1 - Seibold, Götz A1 - Bansil, Arun T1 - Short range smectic order driving long range nematic order: example of cuprates T2 - Scientific reports Y1 - 2016 UR - http://www.nature.com/articles/srep19678 U6 - https://doi.org/10.1038/srep19678 SN - 2045-2322 VL - 6 SP - 19678 ER - TY - GEN A1 - Seibold, Götz A1 - Benfatto, Lara A1 - Castellani, Claudio A1 - Lorenzana, José T1 - Current Correlations in Strongly Disordered Superconductors T2 - Journal of Superconductivity and Novel Magnetism Y1 - 2016 UR - http://link.springer.com/article/10.1007%2Fs10948-015-3300-6 U6 - https://doi.org/10.1007/s10948-015-3300-6 VL - 29 IS - 3 SP - 577 EP - 580 ER - TY - GEN A1 - Tea, C. A1 - Castellani, Claudio A1 - Seibold, Götz A1 - Benfatto, Lara T1 - Nonrelativistic Dynamics of the Amplitude (Higgs) Mode in Superconductors T2 - Physical Review Letters Y1 - 2015 UR - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.157002 U6 - https://doi.org/http://dx.doi.org/10.1103/PhysRevLett.115.157002 SN - 1079-7114 VL - 115 SP - 157002 ER - TY - GEN A1 - Seibold, Götz A1 - Caprara, Sergio A1 - Grilli, Marco A1 - Raimondi, Roberto T1 - Intrinsic spin Hall effect in systems with striped spin-orbit coupling T2 - epl : a letters journal exploring the frontiers of physics KW - Condensed Matter Y1 - 2015 UR - http://epljournal.edpsciences.org/articles/epl/abs/2015/19/epl17411/epl17411.html U6 - https://doi.org/http://dx.doi.org/10.1209/0295-5075/112/17004 SN - 1286-4854 VL - 112 IS - 1 SP - 17004-p1 EP - 17004-p6 ER - TY - GEN A1 - Cea, Tommaso A1 - Bucheli, Daniel A1 - Seibold, Götz A1 - Benfatto, Lara A1 - Lorenzana, José A1 - Castellani, Claudio T1 - Optical excitation of phase modes in strongly disordered superconductors T2 - Physical Review B N2 - According to the Goldstone theorem the breaking of a continuous U(1) symmetry comes along with the existence of low-energy collective modes. In the context of superconductivity these excitations are related to the phase of the superconducting (SC) order parameter and for clean systems are optically inactive; that is, single-mode excitations do not directly couple to light. Here we show that for strongly disordered superconductors phase modes acquire a dipole moment and appear as a subgap spectral feature in the optical conductivity. This finding is obtained with both a gauge-invariant random-phase approximation scheme based on a fermionic Bogoliubov–de Gennes state and a prototypical bosonic model for disordered superconductors. In the strongly disordered regime, where the system displays an effective granularity of the SC properties, the optically active dipoles are linked to the isolated SC islands, offering a new perspective for realizing microwave optical devices. Y1 - 2014 UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.174506 U6 - https://doi.org/10.1103/PhysRevB.89.174506 SN - 2469-9969 VL - 89 SP - 174506 ER - TY - GEN A1 - Bucheli, Daniel A1 - Grilli, Marco A1 - Peronaci, F. A1 - Seibold, Götz A1 - Caprara, Sergio T1 - Phase diagrams of voltage-gated oxide interfaces with strong Rashba coupling T2 - Physical Review B N2 - We propose a model for the two-dimensional electron gas formed at the interface of oxide heterostructures that includes a Rashba spin-orbit coupling proportional to an electric field oriented perpendicularly to the interface. Taking into account the electron density dependence of this electric field confining the electron gas at the interface, we report the occurrence of a phase separation instability (signaled by a negative compressibility) for realistic values of the spin-orbit coupling and of the electronic band-structure parameters at zero temperature. We extend the analysis to finite temperatures and in the presence of an in-plane magnetic field, thereby obtaining two phase diagrams that exhibit a phase separation dome. By varying the gating potential, the phase separation dome may shrink and vanish at zero temperature into a quantum critical point where the charge fluctuates dynamically. Similarly, the phase separation may be spoiled by a planar magnetic field even at zero temperature leading to a line of quantum critical points. Y1 - 2014 UR - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.195448 U6 - https://doi.org/10.1103/PhysRevB.89.195448 SN - 2469-9969 VL - 89 ER - TY - GEN A1 - Seibold, Götz A1 - Di Castro, Carlo A1 - Grilli, Marco A1 - Lorenzana, José T1 - Spin excitations of ferronematic order in underdoped cuprate superconductors T2 - Scientific reports N2 - High-temperature superconductors exhibit a characteristic hourglass-shaped spectrum of magnetic fluctuations which most likely contribute to the pairing glue in the cuprates. Recent neutron scattering experiments in strongly underdoped compounds have revealed a significant low energy anisotropy of these fluctuations which we explain by a model in which topological defects of the antiferromagnet clump to producing domain wall segments with ferronematic order. This state does not invoke global charge order but breaks C4 rotational and inversion symmetry. The incommensurability of the low doping charge-disordered state is in good agreement with experiment and interpolates smoothly with the incommensurability of the stripe phase at higher doping. Within linear spin-wave theory the dynamic structure factor is in very good agreement with inelastic neutron scattering data and can account for the observed energy dependent anisotropy. Y1 - 2014 UR - http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060504/ U6 - https://doi.org/10.1038/srep05319 SN - 2045-2322 IS - 4 SP - 5319 ER - TY - GEN A1 - Seibold, Götz A1 - Markiewicz, Richard S. A1 - Lorenzana, José T1 - Magnetic Structure of Electronic Inhomogeneities in Cuprates: Competition between Stripes and Spirals T2 - Acta Physica Polonica A N2 - It is shown that the magnetic structure of high-T c superconductors is strongly influenced by the next-nearest neighbor hopping parameter t' which distinguishes different families of cuprates. Our investigations indicate that uniform spirals get favored by a large t'=t ratio but are unstable at small doping towards stripes with spin canting. For large /t'/t/ spirals can be stabilized under certain conditions in the overdoped regime which may explain the elastic incommensurate magnetic response recently observed in iron-co-doped Bi2201 materials. Y1 - 2012 UR - https://www.researchgate.net/publication/230739012_Magnetic_Structure_of_Electron ic_Inhomogeneities_in_Cuprates_Competition_between_Stripes_and_Spirals SN - 1898-794X VL - 121 IS - 5-6 SP - 1019 EP - 1021 ER - TY - GEN A1 - Seibold, Götz A1 - Markiewicz, Richard S. A1 - Lorenzana, José T1 - Stripes with Spin Canting in the Three-Band Hubbard Model T2 - Journal of Superconductivity and Novel Magnetism N2 - In underdoped cuprates, both stripes and spiral states may account for the incommensurate spin response observed by elastic neutron scattering experiments. Here, we investigate the respective stability of both textures within the framework of the three-band Hubbard model which we treat within the unrestricted Gutzwiller approximation. Our calculations indicate that for parameter sets appropriate for lanthanum cuprates and small doping nor purely longitudinal stripes nor uniform spirals are stable but stripes with significant spin canting. Indeed at small doping uniform spirals are unstable toward nanoscale phase separation. KW - Stripes KW - Spirals KW - High-temperature superconductors Y1 - 2013 UR - http://link.springer.com/article/10.1007/s10948-012-1701-3 U6 - https://doi.org/10.1007/s10948-012-1701-3 SN - 1557-1939 SN - 1557-1947 VL - 26 IS - 1 SP - 49 EP - 52 ER - TY - GEN A1 - Lemarié, Gabriel A1 - Kamlapure, Anand A1 - Benfatto, Lara A1 - Lorenzana, José A1 - Seibold, Götz A1 - Ganguli, S. C. A1 - Raychaudhuri, Pratap A1 - Castellani, Claudio T1 - Universal scaling of the order-parameter distribution in strongly disordered superconductors T2 - Physical Review B N2 - We investigate theoretically and experimentally the statistical properties of the inhomogeneous order-parameter distribution (OPD) at the verge of the superconductor-insulator transition (SIT). We find within two prototype fermionic and bosonic models for disordered superconductors that one can identify a universal rescaling of the OPD. By performing scanning-tunneling microscopy experiments in three samples of NbN with increasing disorder we show that such a rescaling also describes the experimental data with excellent accuracy. These results can provide a breakthrough in our understanding of the SIT. Y1 - 2013 UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.184509 U6 - https://doi.org/10.1103/PhysRevB.87.184509 SN - 2469-9977 VL - 87 IS - 18 SP - 184509 ER - TY - GEN A1 - Seibold, Götz A1 - Capati, Matteo A1 - Grilli, Marco A1 - Di Castro, Carlo A1 - Grilli, Marco A1 - Lorenzana, José T1 - Hidden ferronematic order in underdoped cuprates T2 - Physical Review B N2 - We study a model for low-doped cuprates where holes aggregate into oriented stripe segments which have a magnetic vortex and antivortex at the extremes. We argue that due to the interaction between segments a ferronematic state with macroscopic polarization is stabilized. This state can be characterized as a charge nematic which, due to the net polarization, breaks inversion symmetry and also exhibits an incommensurate spin modulation. Our calculation can reproduce the doping-dependent spin structure factor of lanthanum cuprates in excellent agreement with experiment and allows to rationalize experiments in which the incommensurability has an order-parameter-like temperature dependence. Y1 - 2013 UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.035138 U6 - https://doi.org/10.1103/PhysRevB.87.035138 SN - 2469-9969 VL - 87 IS - 3 SP - 035138 ER - TY - GEN A1 - Seibold, Götz A1 - Pickhardt, Michael T1 - Lapse of time effects on tax evasion in an agent-based econophysics model T2 - Physica A: Statistical Mechanics and its Applications N2 - We investigate an inhomogeneous Ising model in the context of tax evasion dynamics where different types of agents are parameterized via local temperatures and magnetic fields. In particular, we analyze the impact of lapse of time effects (i.e. backauditing) and endogenously determined penalty rates on tax compliance. Both features contribute to a microfoundation of agent-based econophysics models of tax evasion. Y1 - 2013 UR - http://www.sciencedirect.com/science/article/pii/S0378437113000307 U6 - https://doi.org/10.1016/j.physa.2013.01.016 SN - 0378-4371 VL - 392 IS - 9 SP - 2079 EP - 2087 ER - TY - GEN A1 - Pickhardt, Michael A1 - Seibold, Götz T1 - Income tax evasion dynamics: Evidence from an agent-based econophysics model T2 - Journal of Economic Psychology N2 - • We extend existing econophysics models with respect to the behavioral heterogeneity of agents. • We analyze enforcement or audit efficiency. • We compare agent-based tax evasion models in the economics versus the econophysics domain. KW - Tax evasion KW - Tax compliance KW - Ising model KW - Econophysics KW - Numerical simulation Y1 - 2013 UR - http://www.sciencedirect.com/science/article/pii/S0167487013000408 U6 - https://doi.org/10.1016/j.joep.2013.01.011 SN - 0167-4870 VL - 40 SP - 147 EP - 160 ER - TY - GEN A1 - Bünemann, Jörg A1 - Capone, Michael A1 - Lorenzana, José A1 - Seibold, Götz T1 - Linear-response dynamics from the time-dependent Gutzwiller approximation T2 - New Journal of Physics N2 - Within a Lagrangian formalism, we derive the time-dependent Gutzwiller approximation for general multi-band Hubbard models. Our approach explicitly incorporates the coupling between time-dependent variational parameters and a time-dependent density matrix from which we obtain dynamical correlation functions in the linear-response regime. Our results are illustrated for the one-band model where we show that the interacting system can be mapped to an effective problem of fermionic quasiparticles coupled to 'doublon' (double occupancy) bosonic fluctuations. The latter have an energy on the scale of the on-site Hubbard repulsion U in the dilute limit but become soft at the Brinkman–Rice transition, which is shown to be related to an emerging conservation law of doublon charge and the associated gauge invariance. Coupling with the boson mode produces a structure in the charge response and we find that a similar structure appears in dynamical mean-field theory. Y1 - 2013 UR - http://iopscience.iop.org/article/10.1088/1367-2630/15/5/053050 SN - 1367-2630 VL - 15 ER -