Angle-resolved photoemission spectroscopy of the insulating NaxWO3:: Anderson localization, polaron formation, and remnant Fermi surface -: art. no. 147603

被引：33

作者：

Raj, S ^{[1
]}

Hashimoto, D

Matsui, H

Souma, S

Sato, T

Takahashi, T

Sarma, DD

Mahadevan, P

Oishi, S

机构：

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

[2] JST, CREST, Kawaguchi 3320012, Japan

[3] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[4] SN Bose Natl Ctr Basic Sci, Kolkata 700098, W Bengal, India

[5] Shinshu Univ, Fac Engn, Nagano 3808553, Japan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.96.147603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure of the insulating sodium tungsten bronze, Na0.025WO3, is investigated by high-resolution angle-resolved photoemission spectroscopy. We find that near-E-F states are localized due to the strong disorder arising from random distribution of Na+ ions in the WO3 lattice, which makes the system insulating. The temperature dependence of photoemission spectra provides direct evidence for polaron formation. The remnant Fermi surface of the insulator is found to be the replica of the real Fermi surface in the metallic system.

引用

页数：4