ROBUSTNESS OF A LOCAL FERMI-LIQUID AGAINST FERROMAGNETISM AND PHASE-SEPARATION

被引:23
作者
ENGELBRECHT, JR [1 ]
BEDELL, KS [1 ]
机构
[1] LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA
关键词
D O I
10.1103/PhysRevLett.74.4265
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the properties of Fermi liquids with the microscopic constraint of a local self-energy. In this case the forward scattering sum rule imposes strong limitations on the Fermi-liquid parameters, which rule out any Pomeranchek instabilitiesboth ferromagnetism and phase separation are suppressed. Superconductivity is possible in an s-wave channel only. We also study the approach to the metal-insulator transition, and find a Wilson ratio approaching 2. This ratio and other properties of Sr1-xLaxTiO3 are all consistent with the local Fermi-liquid scenario. © 1995 The American Physical Society.
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页码:4265 / 4268
页数:4
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