Momentum dependent spectral changes induced by the charge density wave in 2H-TaSe2 and the implication on the CDW mechanism

被引：57
作者：
Liu, R [1 ]
Olson, CG
Tonjes, WC
Frindt, RF
机构：
[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[2] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA
[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
[4] Univ Wisconsin, Ctr Synchrotron Radiat, Madison, WI 53706 USA
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.80.5762
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report a high energy and high angular resolution angle resolved photoemission study of 2H-TaSe2 at temperatures both above and below the charge-density-wave (CDW) transition. In the normal state, an extended saddle band very close to the Fermi energy was observed. The CDW-induced energy gap is near zero on a well defined Fermi surface and large in the extended saddle band region. The implication of these results on the CDW mechanism is discussed.
引用
收藏
页码：5762 / 5765
页数：4
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