ELECTRONICALLY DRIVEN TETRAGONAL DISTORTION IN TIH2

被引：89

作者：

GUPTA, M ^{[1
]}

机构：

[1] FAC SCI ORSAY,F-91405 ORSAY,FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 29卷 / 01期

关键词：

D O I：

10.1016/0038-1098(79)90149-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A study of the fluorite structure stoichiometric TiH2 by means of the augmented plane wave method reveals that the density of states at the Fermi level is very high, due mainly to a degenerate flat band in the ΛL direction. This result, in agreement with the experimental data of Ducastelle, Caudron and Costa confirms their interpretation of the tetragonal distortion in terms of a Jahn-Teller type effect. The Fermi surface geometry is discussed in connection with the sign change of the observed Hall coefficient. A comparison with Switendick's previous work on hydrides is also given. © 1979.

引用

页码：47 / 51

页数：5

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