Photoemission study of the filling-control metal-insulator transition in the two-dimensional system La1.17-xPbxVS3.17

被引：2

作者：

Ino, A

Fujimori, S

Okane, T

Fujimori, A

Mizokawa, T

Yasui, Y

Nishikawa, T

Sato, M

机构：

[1] Japan Atom Energy Res Inst, Synchrotron Radiat Res Ctr, Mikazuki, Hyogo 6795148, Japan

[2] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Tokyo, Dept Complex Sci & Engn, Bunkyo Ku, Tokyo 1130033, Japan

[4] Nagoya Univ, Dept Phys, Div Mat Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷

基金：

日本科学技术振兴机构;

关键词：

phase transitions-metal-insulator; two-dimensional systems; photoemission; electronic structure;

D O I：

10.1016/S0304-8853(00)00701-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using photoemission spectroscopy, the electronic structure around the two-dimensional filling-control metal-insulator transition (MIT) of La1.17-xPbxVS3.17 has been studied. The density of state at the Fermi level disappears in going to the insulating phase, i.e., as x approaches similar to 0.17 or as the temperature decreases at x = 0.15. The chemical potential shift with carrier doping shows a finite jump between the electron- and hole-doped samples and is unusually suppressed around x = 0.17. The results are contrary to a rigid band picture and show the presence of a pseudogap in the metallic phase. 2001 Elsevier Science B.V. All rights reserved.

引用

页码：263 / 265

页数：3

共 7 条

[1] Doping dependent density of states and pseudogap behavior in La2-xSrxCuO4. [J].