TEMPERATURE-DEPENDENT PSEUDOGAP AND ELECTRON LOCALIZATION IN 1T-TAS2

被引：91

作者：

DARDEL, B ^{[1
]}

GRIONI, M ^{[1
]}

MALTERRE, D ^{[1
]}

WEIBEL, P ^{[1
]}

BAER, Y ^{[1
]}

LEVY, F ^{[1
]}

机构：

[1] ECOLE POLYTECH FED LAUSANNE,PHYS APPL LAB,CH-1015 LAUSANNE,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.45.1462

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Photoelectron spectroscopy reveals a striking correspondence between charge-density-wave-related phase transitions and modifications of the electronic structure in 1T-TaS2. High-energy-resolution spectra indicate that the collapse of the Fermi surface is abrupt at the quasicommensurate-commensurate transition (approximately 185 K) and that, below this critical temperature, the Fermi level lies in a deep, temperature-dependent pseudogap. These results strongly suggest successive localizations due to electron correlations and disorder, and resolve an outstanding contradiction between transport data and previous spectroscopic results with lower resolution.

引用

页码：1462 / 1465

页数：4

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