Superconductivity from Strong Correlation in High-Temperature Superconductors

We investigate the two-dimensional Hubbard model as a model for cuprate high-temperature superconductors. The Coulomb interaction is a candidate that can bring about high-temperature superconductivity because its characteristic energy is of the order of eV. It is not clear and not trivial whether th...

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Published in:Journal of superconductivity and novel magnetism 2016-03, Vol.29 (3), p.655-657
Main Authors: Yanagisawa, Takashi, Miyazaki, Mitake, Yamaji, Kunihiko
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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description We investigate the two-dimensional Hubbard model as a model for cuprate high-temperature superconductors. The Coulomb interaction is a candidate that can bring about high-temperature superconductivity because its characteristic energy is of the order of eV. It is not clear and not trivial whether the on-site Coulomb interaction leads to a pairing interaction between two electrons. We argue that high-temperature superconductivity is possible in the strongly correlated region, where U is greater than the bandwidth, by using the variational Monte Carlo method for two-dimensional electronic models. We use the wave functions that include electron correlation beyond the Gutzwiller ansatz.
doi_str_mv 10.1007/s10948-015-3303-3
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subjects Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
title Superconductivity from Strong Correlation in High-Temperature Superconductors
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