@inproceedings{DudekLupinaKozłowskietal., author = {Dudek, Peter and Lupina, Grzegorz and Kozłowski, Grzegorz and Dabrowski, Jarek Marek and Lippert, Gunther and M{\"u}ssig, Hans-Joachim and Schmeißer, Dieter and Schroeder, Thomas}, title = {Band structure and electrical properties of MBE grown HfO2 - based alkaline earth perovskites}, series = {Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 45}, booktitle = {Verhandlungen der Deutschen Physikalischen Gesellschaft, Reihe 6, Bd. 45}, publisher = {Deutsche Physikalische Gesellschaft}, address = {Bad Honnef}, issn = {0420-0195}, pages = {S. 232}, abstract = {Ultra thin dielectric films (<20 nm) deposited on TiN electrodes are interesting for MIM capacitor application. High capacitance density and dielectric permittivity must be accompanied by extremely low leakage currents (10-8 A/cm2) at bias 0.5 V. To achieve such low leakage currents, high band gap and proper band alignment is required. Occupied electronic states can be probed with standard laboratory photoemission methods. Probing of unoccupied states is more challenging. Synchrotron based PES in combination with XAS forms a powerful method to study the band alignment. ASAM end station located at the U 49/2 PGM 2 beamline of BESSY II (Berlin) offers excellent conditions for performing such measurements. We investigated HfO2 - based alkaline earth perovskite - BaHfO3 with subsequent admixture of TiO2, resulting in formation of BaHf0.5Ti0.5O3 compound. The analysis of data indicates that band gap for HfO2 is similar to BaHfO3 and amounts 5.8 eV; for BaHf0.5Ti0.5O3 it decreases to 3.8 eV. We conclude that the addition of TiO2 to BaHfO3 increases significantly the dielectric permittivity but also impacts the band gap alignment. The conduction band offset shrinks, influencing the leakage current behavior.}, language = {en} } @misc{DudekLupinaKozłowskietal., author = {Dudek, Piotr T. and Lupina, Grzegorz and Kozłowski, Grzegorz and Zaumseil, Peter and Bauer, Jakob and Fursenko, Oksana and Dabrowski, Jarek Marek and Schmidt, R. and Lippert, Gunther and M{\"u}ssig, Hans-Joachim and Schr{\"o}der, Thomas and Schmeißer, Dieter and Zschech, Ehrenfried}, title = {Atomic-scale engineering of future high-k dynamic random access memory dielectrics: The example of partial Hf substitution by Ti in BaHfO3}, series = {Journal of Vacuum Science and Technology / B}, volume = {29}, journal = {Journal of Vacuum Science and Technology / B}, number = {1}, issn = {2166-2754}, language = {en} } @misc{CapelliniDeSetaZaumseiletal., author = {Capellini, Giovanni and De Seta, Monica and Zaumseil, Peter and Kozłowski, Grzegorz and Schroeder, Thomas}, title = {High temperature x-ray diffraction measurements on Ge/Si(001) heterostructures: a study on the residual tensile strain}, series = {Journal of Applied Physics}, volume = {111}, journal = {Journal of Applied Physics}, number = {7}, issn = {0021-8979}, doi = {10.1063/1.3702443}, language = {en} } @misc{KozłowskiFursenkoZaumseiletal., author = {Kozłowski, Grzegorz and Fursenko, Oksana and Zaumseil, Peter and Schroeder, Thomas and Vorderwestner, M. and Storck, Peter}, title = {The epitaxial growth of low defect SiGe buffer layers for integration of new materials on 300 mm silicon wafers}, series = {ECS transactions}, volume = {50}, journal = {ECS transactions}, number = {9}, issn = {1938-6737}, pages = {613 -- 621}, language = {en} } @misc{ZaumseilKozłowskiYamamotoetal., author = {Zaumseil, Peter and Kozłowski, Grzegorz and Yamamoto, Yuji and Schubert, Markus Andreas and Schroeder, Thomas}, title = {X-ray Characterization of Ge Dots Epitaxially Grown on Nano-structured Si Islands on SOI Substrates}, series = {Journal of Applied Crystallography}, volume = {46}, journal = {Journal of Applied Crystallography}, number = {4}, issn = {0021-8898}, pages = {868 -- 873}, language = {en} } @misc{ZaumseilYamamotoBaueretal., author = {Zaumseil, Peter and Yamamoto, Yuji and Bauer, Joachim and Schubert, Markus Andreas and Matejova, Jana and Kozłowski, Grzegorz and Schr{\"o}der, Thomas and Tillack, Bernd}, title = {Preparation and Characterization of Ge Epitaxially Grown on Nano-structured Periodic Si Pillars and Bars on Si(001) Substrate}, series = {Thin Solid Films}, volume = {520}, journal = {Thin Solid Films}, number = {8}, issn = {0040-6090}, doi = {10.1016/j.tsf.2011.10.178}, pages = {3240 -- 3244}, language = {en} } @misc{KozłowskiZaumseilSchubertetal., author = {Kozłowski, Grzegorz and Zaumseil, Peter and Schubert, Markus Andreas and Yamamoto, Yuji and Sch{\"u}lli, Tobias U. and Tillack, Bernd and Schroeder, Thomas}, title = {Growth and relaxation processes in Ge nanocrystals on free-standing Si(001) nanopillars}, series = {Nanotechnology}, volume = {23}, journal = {Nanotechnology}, number = {11}, issn = {0957-4484}, doi = {10.1088/0957-4484/23/11/115704}, pages = {115704 -- 115711}, language = {en} } @misc{CapelliniKozłowskiYamamotoetal., author = {Capellini, Giovanni and Kozłowski, Grzegorz and Yamamoto, Yuji and Lisker, Marco and Tillack, Bernd and Ghrib, A. and Kersauson, M. de and El Kurdi, M. and Boucaud, P. and Schroeder, Thomas}, title = {Tensile strained Ge layers obtained via Si-CMOS compatible approach}, series = {Journal of Applied Physics}, volume = {113}, journal = {Journal of Applied Physics}, number = {1}, pages = {013513-1 -- 013513-6}, language = {en} } @misc{ZaumseilKozłowskiSchubertetal., author = {Zaumseil, Peter and Kozłowski, Grzegorz and Schubert, Markus Andreas and Yamamoto, Yuji and Bauer, J. and Sch{\"u}lli, Tobias U. and Tillack, Bernd and Schroeder, Thomas}, title = {The role of SiGe buffer in growth and relaxation of Ge on free-standing Si(001) nanopillars}, series = {Nanotechnology}, volume = {23}, journal = {Nanotechnology}, number = {35}, issn = {1361-6528}, pages = {355706}, language = {en} } @misc{BauerYamamotoZaumseiletal., author = {Bauer, J. and Yamamoto, Yuji and Zaumseil, Peter and Fursenko, Oksana and Schulz, K. and Kozłowski, Grzegorz and Schubert, Markus Andreas and Schroeder, Thomas and Tillack, Bernd}, title = {Nanostructured Silicon for Ge Nanoheteroepitaxy}, series = {Microelectronics Engineering}, volume = {97}, journal = {Microelectronics Engineering}, issn = {0167-9317}, pages = {169 -- 172}, language = {en} } @misc{ZaumseilKozłowskiYamamotoetal., author = {Zaumseil, Peter and Kozłowski, Grzegorz and Yamamoto, Yuji and Bauer, J. and Schubert, Markus Andreas and Sch{\"u}lli, Tobias U. and Tillack, Bernd and Schroeder, Thomas}, title = {Compliant Si nanostructures on SOI for Ge nanoheteroepitaxy - a case study for lattice mismatched semiconductor integration on Si(001)}, series = {Journal of Applied Physics}, volume = {112}, journal = {Journal of Applied Physics}, number = {4}, issn = {0021-8979}, pages = {043506 -- 043511}, language = {en} }