High-resolution angle-resolved photoemission study of incommensurate charge-density-wave compound CeTe3 -: art. no. 195101

被引：41

作者：

Komoda, H

Sato, T

Souma, S

Takahashi, T

Ito, Y

Suzuki, K

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Yokohama Natl Univ, Grad Sch Environm & Informat Sci, Hodogaya Ku, Yokohama, Kanagawa 2048501, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 19期

基金：

日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevB.70.195101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-resolution angle-resolved photoemission spectroscopy (ARPES) has been performed on layered cerium trichalcogenide CeTe3 to study the incommensurate charge-density-wave (CDW) mechanism. We found that ARPES spectra near the Fermi level along the superlattice direction (GammaY direction) show existence of multiple shadow bands due to the CDW formation, while those along the GammaX direction perpendicular to GammaY do not show such a band folding. The energy dispersion of shadow bands is understood in terms of the momentum transfer due to the periodic lattice distortion vector. The observed sizable CDW gap amplitude (>250 meV) around Y point is in accordance with the observation of higher order shadow bands.

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页码：1 / 6

页数：6

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