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Strange metal behaviour from charge density fluctuations in cuprates

  • Besides the mechanism responsible for high critical temperature superconductivity, the grand unresolved issue of the cuprates is the occurrence of a strange metallic state above the so-called pseudogap temperature T*. Even though such state has been successfully described within a phenomenological scheme, the so-called Marginal Fermi-Liquid theory, a microscopic explanation is still missing. However, recent resonant X-ray scattering experiments identified a new class of charge density fluctuations characterized by low characteristic energies and short correlation lengths, which are related to the well-known charge density waves. These fluctuations are present over a wide region of the temperature-vs-doping phase diagram and extend well above T*. Here we investigate the consequences of charge density fluctuations on the electron and transport properties and find that they can explain the strange metal phenomenology. Therefore, charge density fluctuations are likely the long-sought microscopic mechanism underlying the peculiarities ofBesides the mechanism responsible for high critical temperature superconductivity, the grand unresolved issue of the cuprates is the occurrence of a strange metallic state above the so-called pseudogap temperature T*. Even though such state has been successfully described within a phenomenological scheme, the so-called Marginal Fermi-Liquid theory, a microscopic explanation is still missing. However, recent resonant X-ray scattering experiments identified a new class of charge density fluctuations characterized by low characteristic energies and short correlation lengths, which are related to the well-known charge density waves. These fluctuations are present over a wide region of the temperature-vs-doping phase diagram and extend well above T*. Here we investigate the consequences of charge density fluctuations on the electron and transport properties and find that they can explain the strange metal phenomenology. Therefore, charge density fluctuations are likely the long-sought microscopic mechanism underlying the peculiarities of the metallic state of cuprates.show moreshow less

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Author: Götz SeiboldORCiD, Riccardo Arpaia, Peng Ying Ying, Roberto Fumagalli, Lucio Braicovich, Carlo Di Castro, Marco GrilliORCiD, Giacomo Claudio Ghiringhelli, Sergio CapraraORCiD
URL:https://www.nature.com/articles/s42005-020-00505-z
DOI:https://doi.org/10.1038/s42005-020-00505-z
ISSN:2399-3650
Title of the source (English):Communications Physics
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2021
Tag:Electronic properties and materials; Superconducting properties and materials
Volume/Year:4
First Page:1
Last Page:6
Article number:7
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Computational Physics
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