Spectral function of two-dimensional Fermi liquids

被引：14

作者：

Halboth, CJ ^{[1
]}

Metzner, W ^{[1
]}

机构：

[1] Univ Munchen, Sekt Phys, D-80333 Munchen, Germany

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.57.8873

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that the spectral function for single-particle excitations in a two-dimensional Fermi liquid has a Lorentzian shape in the low-energy limit. Landau quasiparticles have a uniquely defined spectral weight and a decay rate which is much smaller than the quasiparticle energy. By contrast, perturbation theory and the T-matrix approximation yield spurious deviations from Fermi-liquid behavior, which are particularly pronounced for a linearized dispersion relation. [S0163-1829(98)00215-X].

引用

页码：8873 / 8877

页数：5

共 29 条

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