Charge-density wave and three-dimensional Fermi surface in 1T-TaSe2 studied by photoemission spectroscopy

被引：40

作者：

Horiba, K

Ono, K ^{[1
]}

Oh, JH

Kihara, T

Nakazono, S

Oshima, M

Shiino, O

Yeom, HW

Kakizaki, A

Aiura, Y

机构：

[1] Univ Tokyo, Dept Appl Chem, Tokyo 1138656, Japan

[2] TDK Corp, Data Storage Technol Ctr, Saku 3850009, Japan

[3] Yonsei Univ, Atom Scale Surface Sci Res Ctr, Seoul 120749, South Korea

[4] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[5] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[6] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.66.073106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the electronic structure of the commensurate charge-density-wave (CDW) phase for 1T-TaSe2 by Ta 4f core-level and the angle-resolved photoemission. From the energy shifts of Ta 4f core levels due to a CDW formation, it is found that the CDW amplitude in the 1T-TaSe2 is smaller than that in 1T-TaS2 reported previously. The band dispersion along the normal to the two-dimensional layers indicates that 1T-TaSe2 has a three-dimensional (3D) character in the Fermi surface compared with 1T-TaS2, which has a two-dimensional Fermi surface. The 3D Fermi surface of 1T-TaSe2 is thought to originate from the larger interaction between layers due to a large charge transfer between Ta 5d and Se 4p orbitals.

引用

页码：731061 / 731064

页数：4

共 21 条

[1] CONDUCTION-BAND STRUCTURE AND CHARGE-DENSITY WAVES IN 1T-TAS2 [J].