IMPORTANCE OF STRUCTURAL INSTABILITY TO HIGH-TEMPERATURE SUPERCONDUCTIVITY

被引：38

作者：

BUSSMANNHOLDER, A

MIGLIORI, A

FISK, Z

SARRAO, JL

LEISURE, RG

CHEONG, SW

机构：

[1] UNIV BAYREUTH,W-8550 BAYREUTH,GERMANY

[2] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545

[3] AT&T BELL LABS,MURRAY HILL,NJ 07974

[4] COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.67.512

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The orthorhombic-tetragonal structural phase transition of La(2-x)Sr(x)CuO4 is quantitatively analyzed as a function of composition x within an anharmonic electron-phonon interaction model. The correct temperature dependence of the soft mode and the elastic constant C66 is obtained. The double-well potential in the electron-phonon interaction is derived self-consistently and found to vary strongly with x. In the vicinity of the superconducting transition temperature T(c) electron-two-phonon interactions dominate the harmonic ones which may explain the high T(c)'s observed.

引用

页码：512 / 515

页数：4

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