WAVE-VECTOR ORIENTATION OF A CHARGE-DENSITY WAVE IN POTASSIUM

被引：39

作者：

GIULIANI, GF

OVERHAUSER, AW

机构：

[1] Department of Physics, Purdue University, West Lafayette

来源：

PHYSICAL REVIEW B | 1979年 / 20卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.20.1328

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A criterion for the preferred direction of the wave vector Q of a charge-density wave (CDW) is obtained by means of a simple theory. Screening of the electric field caused by the CDW is provided by a sinusoidal distortion of the positive-ion lattice. The optimum Q direction is that which minimizes the elastic energy of distortion. For potassium the Q direction is found to be tilted about 4° away from a [110] direction. The exact value of the tilt depends on the magnitude of Q. © 1979 The American Physical Society.

引用

页码：1328 / 1331

页数：4

共 17 条

[1] A NEUTRON DIFFRACTION SEARCH FOR A CHARGE DENSITY WAVE IN POTASSIUM METAL [J].