EQUATION OF MOTION FOR THE GREENS-FUNCTION IN ANHARMONIC SOLIDS

被引：10

作者：

DELLAVALLE, RG ^{[1
]}

PROCACCI, P ^{[1
]}

机构：

[1] UNIV FLORENCE,DEPT CHIM,I-50121 FLORENCE,ITALY

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.46.6141

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We discuss the double-time Green's-function approach for the phonon-phonon interaction in anharmonic solids. Using a certain interpretation of the phonon operators, the crystal Hamiltonian may be rewritten in a compact form. The equation of motion for the Green's function is tremendously simplified with this formalism. The self-energy can be obtained in a very simple way, to any desired perturbation order. Our results reproduce the corresponding terms of the available literature results, which are limited to the fourth order in the perturbation parameter.

引用

页码：6141 / 6149

页数：9

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