Topological suppression of the charge-density-wave transition in TiSe2

被引：3

作者：

Titov, A. N. ^{[1
,2
]}

Merentsov, A. I. ^{[2
]}

Kazantseva, N. V. ^{[1
]}

Titov, A. A. ^{[1
]}

Shkvarina, E. G. ^{[1
]}

机构：

[1] Russian Acad Sci, Mikheev Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] Ural Fed Univ, Inst Nat Sci & Math, Ekaterinburg 620089, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 737卷

基金：

俄罗斯基础研究基金会; 俄罗斯科学基金会;

关键词：

Charge-density-wave; TiSe2; Chalcogenides; Spatial coherence; Defect structure; TRANSPORT-PROPERTIES; STATE; INTERCALATION;

D O I：

10.1016/j.jallcom.2017.12.155

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of the selective distortion of the Se and Ti sublattices on the stability of the charge-density-wave (CDW) state has been studied. The selective distortion has been obtained in two ways: by Mn or Cr intercalation, which differ in the selective hybridization between Mn 3d/Se 4p and Cr 3d/Ti 3d orbitals, and by the plastic uniaxial deformation of the TiSe2 single crystals. Plastic deformation generates defects in the Se sublattice, which create the difference between the nearest neighbor positions. It is found that the distortions of the Se sublattice make impact up to 1000 times more on the CDW state stability than those of the Ti sublattice. The effect is related to the distortion of the spatial coherence of the Se 4p-orbitals. The critical size of the coherence area, below which the CDW becomes unstable structure and loses a long-range-order, has been estimated. It is found that such a kind of suppression does not change the temperature of the CDW transition but gradually decreases its amplitude. (c) 2017 Elsevier B.V. All rights reserved.

引用

页码：829 / 835

页数：7

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