Temperature dependent photoemission spectroscopy on lightly-doped sodium tungsten bronze

被引：3

作者：

Paul, Sanhita ^{[1
]}

Ghosh, Anirudha ^{[1
]}

Chakraborty, Anirban ^{[2
]}

Petaccia, Luca ^{[3
]}

Topwal, D. ^{[3
]}

Sarma, D. D. ^{[2
]}

Oishi, S. ^{[4
]}

Raj, Satyabrata ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res Kolkata, Dept Phys Sci, Nadia 741252, India

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

[3] Sincrotrone Trieste SCpA, I-34149 Trieste, Italy

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

来源：

SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 06期

关键词：

Disordered systems; Insulator; Electronic band structure; Photoelectron spectroscopies; DISORDERED-SYSTEMS; POLARON; ABSORPTION; CONDUCTIVITY; ABSENCE; WO3;

D O I：

10.1016/j.ssc.2011.12.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Temperature dependent photoemission studies on lightly doped (x = 0.025) sodium tungsten bronzes, NaxWO3 have been investigated by high-resolution photoemission spectroscopy. The experimental results show evidence for polaron formation at the valence band edge and the photoemission spectra taken in different modes of the electron analyzer suggest that the density of states at the valence band edge gradually moves to other k-points in the Brillouin zone with increasing temperature and explain the dynamics of polarons in the insulating disordered sodium tungsten bronzes. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：493 / 496

页数：4

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