TY - JOUR
T1 - Mean-field theories of cuprate superconductors
T2 - A systematic analysis
AU - Grilli, M.
AU - Kotliar, B. G.
AU - Millis, A. J.
PY - 1990
Y1 - 1990
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.42.329
DO - 10.1103/PhysRevB.42.329
M3 - Article
AN - SCOPUS:0011127997
SN - 0163-1829
VL - 42
SP - 329
EP - 341
JO - Physical Review B
JF - Physical Review B
IS - 1
ER -