Theory of high-temperature superconductivity in strongly correlated fermions system

29th International Symposium on Superconductivity

Nishi, Kazuhisa^1

Department of Engineering, University of Hyogo, Himeji, Hyogo

671-2201, Japan^1

关键词: Fermion operators;    High temperature superconducting cuprates;    High-temperature superconductivity;    Mean field approximation;    Normal properties;    Strongly correlated fermions;    Unified theory;    Unitary transformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012033/pdf
DOI  :  10.1088/1742-6596/871/1/012033

来源: IOP

【 摘 要 】

A unified theory to explain generally the properties of high-temperature superconducting cuprates and iron pnictides etc. is presented. The theory is based on the extended d-p model emphasizing that the electronic state of superconductors can be described by the composed fermions constructed with newly defined operators. The peculiarity in the theory is that the Hamiltonian is so modified by the unitary transformation using these fermion operators as to apply the mean field approximation. It is found that the results can provide a universal explanation about the various superconducting and normal properties of high-temperature superconductors.