Chiral Charge-Density Waves

被引：133

作者：

Ishioka, J. ^{[1
]}

Liu, Y. H. ^{[2
]}

Shimatake, K. ^{[1
,2
]}

Kurosawa, T.

Ichimura, K. ^{[1
,3
]}

Toda, Y. ^{[1
,3
]}

Oda, M. ^{[2
,3
]}

Tanda, S. ^{[1
,3
]}

机构：

[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

[3] Hokkaido Univ, Ctr Educ & Res Topol Sci & Technol, Sapporo, Hokkaido 0608628, Japan

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 17期

关键词：

SUPERLATTICE FORMATION; X-RAY; TISE2; 1T-TAS2; SUPERCONDUCTIVITY; MICROSCOPY; SR2RUO4;

D O I：

10.1103/PhysRevLett.105.176401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discovered the chirality of charge-density waves (CDW) in 1T-TiSe2 by using STM and time-domain optical polarimetry. We found that the CDW intensity becomes Ia(1):Ia(2):Ia(3) 1:0.7 +/- 0.1:0.5 +/- 0.1, where Ia(i) (i = 1, 2, 3) is the amplitude of the tunneling current contributed by the CDWs. There were two states, in which the three intensity peaks of the CDW decrease clockwise and anticlockwise. The chirality in CDW results in the threefold symmetry breaking. Macroscopically, twofold symmetry was indeed observed in optical measurement. We propose the new generalized CDW chirality H-CDW equivalent to q(1) . (q(2) x q(3)), where q(i) are the CDW q vectors, which is independent of the symmetry of components. The nonzero H-CDW-the triple-q vectors do not exist in an identical plane in the reciprocal space-should induce a real-space chirality in CDW system.

引用

页数：4

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