ELECTRON-PHONON INTERACTION IN ONE-DIMENSION - EXACT SPECTRAL PROPERTIES

被引：33

作者：

MEDEN, V ^{[1
]}

SCHONHAMMER, K ^{[1
]}

GUNNARSSON, O ^{[1
]}

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,D-70506 STUTTGART,GERMANY

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.50.11179

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

One-electron spectral functions for a one-dimensional continuum model including electron-phonon coupling are calculated exactly. The electrons coupled to the phonons represent a Luttinger liquid. Results are presented for an Einstein model for spinless electrons and for the model including spin. Apart from Luttinger-liquid features, the spectra show a rich satellite structure with peak separations partially determined by matrix-element effects. The use of Migdal's approximation neglecting vertex corrections fails to reproduce the exact spectra even for an effective bandwidth large compared to the phonon frequency. The relevance to high-resolution valence photoemission from quasi-one-dimensional conductors is discussed.

引用

页码：11179 / 11182

页数：4

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