Distribution function of Hubbard quasiparticles in two-dimensional systems with inclusion of dynamic processes of spin-fluctuation scattering

被引：2
|
作者：
Val'kov, V. V. [1 ]
Dzebisashvili, D. M. [1 ]
机构：
[1] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
来源：
PHYSICS OF THE SOLID STATE | 2009年 / 51卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
STATE;
D O I：
10.1134/S1063783409050011
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Spin-fluctuation scattering in an ensemble of strongly correlated electrons in CuO2 planes of high-temperature superconductors is investigated. It is demonstrated that this process significantly modifies the distribution function of Hubbard quasiparticles. The influence of spin-fluctuation scattering mathematically manifests itself in the appearance of the correction to the strength operator in the numerator of the single-fermion Green's function dependent on the Matsubara frequency. This correction differently renormalizes the spectral intensity on different energy scales and determines the dependence of the Migdal discontinuity on the electron concentration in the system.
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页码：877 / 883
页数：7
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