MEAN-FIELD THEORIES OF CUPRATE SUPERCONDUCTORS - A SYSTEMATIC ANALYSIS

被引:63
作者
GRILLI, M
KOTLIAR, BG
MILLIS, AJ
机构
[1] RUTGERS STATE UNIV,SERIN LAB PHYS,PISCATAWAY,NJ 08854
[2] AT&T BELL LABS,MURRAY HILL,NJ 07974
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 01期
关键词
D O I
10.1103/PhysRevB.42.329
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The lattice Anderson model believed to be relevant to high-temperature superconductors and heavy-fermion metals exhibits a variety of different behaviors, including mixed-valence, heavy-fermion, and Mott-insulating states. We determine, via an auxiliary-boson mean-field theory, the parameter regimes in which these behaviors exist. For the two-dimensional CuO2 Anderson model we calculate the susceptibility, and quasiparticle plasma frequency. By comparing these to specific-heat, susceptibility and optical data for high-Tc superconductors, we determine that the materials are in a regime controlled by proximity to a Mott transition and that magnetic correlations play an essential role. © 1990 The American Physical Society.
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页码:329 / 341
页数:13
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