Extraction of a clean charge-density-wave gap for 2H-NaxTaS2

被引：3
|
作者：
Shen, Dawei [1 ,2 ]
Yang, Lexian [1 ,2 ]
Zhang, Yan [1 ,2 ]
Shen, Jialin [1 ,2 ]
Fang, Lei [3 ,4 ]
Yan, Jing [3 ,4 ]
Ma, Dewei [1 ,2 ]
Wen, Haihu [3 ,4 ]
Feng, Donglai [1 ,2 ]
机构：
[1] Fudan Univ, Dept Phys, Appl Surface Phys State Key Lab, Shanghai 200433, Peoples R China
[2] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China
[3] Chinese Acad Sci, Natl Lab Superconduct, Inst Phys, Beijing 100080, Peoples R China
[4] Chinese Acad Sci, Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Electronic structure; Charge-density-wave;
D O I：
10.1016/j.jpcs.2008.06.053
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We develop a novel decomposition method to extract a clean charge-density-wave (CDW) gap of sodium doped 2H-TaS2. from its partially suppressed photoemission spectra in the CDW state. We find that about 1/3 of the spectrum is fully gapped, while the other 2/3 is ungapped. Our results are in contrary to a recent theoretical proposal based on the band picture that divides the system into three decoupled sublattices, with two being distorted due to the CDW formation. (c) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2956 / 2959
页数：4
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