Fe-doping-induced superconductivity in the charge-density-wave system 1T-TaS2

被引：87

作者：

Li, L. J. ^{[1
]}

Lu, W. J. ^{[1
]}

Zhu, X. D. ^{[2
]}

Ling, L. S. ^{[2
]}

Qu, Z. ^{[2
]}

Sun, Y. P. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China

来源：

EPL | 2012年 / 97卷 / 06期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; TRANSITION-METAL DICHALCOGENIDES; PHASE-DIAGRAM; PHOTOEMISSION; LOCALIZATION; STATE; TAS2;

D O I：

10.1209/0295-5075/97/67005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the interplay between charge-density-wave (CDW) and superconductivity of 1T-FexTa1-xS2 (0 <= x <= 0.05) single crystals. The CDW order is gradually suppressed by Fe-doping, accompanied by the disappearance of pseudogap/Mott-gap as shown by the density functional theory (DFT) calculations. The superconducting state develops at low temperatures within the CDW state for the samples with the moderate doping levels. The superconductivity strongly depends on x within a narrow range, and the maximum superconducting transition temperature is 2.8K as x = 0.02. For high doping level (x > 0.04), the Anderson localization (AL) state appears, resulting in a large increase of resistivity. We present a complete electronic phase diagram of the 1T-FexTa1-xS2 system that shows a dome-like T-c(x). Copyright (C) EPLA, 2012

引用

页数：6

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