Spectral consequences of broken phase coherence in 1T-TaS2

被引：87

作者：

Zwick, F ^{[1
]}

Berger, H

Vobornik, I

Margaritondo, G

Forro, L

Beeli, C

Onellion, M

Panaccione, G

Taleb-Ibrahimi, A

Grioni, M

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, IGA, Lab Phys Solides Semicristallins, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne, CIME, CH-1015 Lausanne, Switzerland

[4] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[5] Univ Paris Sud, LURE, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.81.1058

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Random defects destroy long-range phase coherence, and inhibit the metal-insulator transition in the charge density wave (CDW) system 1T-TaS2. Photoelectron spectroscopy with high resolution reveals corresponding changes in the electronic structure. Core level spectra indicate a temperature-dependent limited growth of commensurate CDW domains. Screening by free carriers from the domain boundaries reduces the Coulomb repulsion in the Ta d band by similar to 1/3, compared to pure samples, yielding a finite spectral weight at the Fermi level.

引用

页码：1058 / 1061

页数：4

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