ELECTRON-PHONON COUPLING IN BCC AND 9R LITHIUM

被引：47

作者：

LIU, AY

COHEN, ML

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.44.9678

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We test the hypothesis that the observed absence of superconductivity in Li results from weak electron-phonon coupling in the low-temperature 9R phase. A first-principles study of the phonon spectrum and electron-phonon coupling constant in bcc and 9R Li is presented. The electron-phonon coupling constant is found to be similar in bcc and 9R Li, and in both phases it is too strong to be consistent with the experimental upper bound on the superconducting transition temperature within the standard theory of phonon-mediated superconductivity.

引用

页码：9678 / 9684

页数：7

共 24 条

[1] PSEUDOPOTENTIAL CALCULATION OF MASS ENHANCEMENT AND SUPERCONDUCTING TRANSITION TEMPERATURE OF SIMPLE METALS [J].