Structural phase transition and electronic structure evolution in Ir1?em class="a-plus-plus">x Pt x Te2 studied by scanning t
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- 作者：Wei Ruan ; Peizhe Tang ; Aifang Fang ; Peng Cai ; Cun Ye ; Xintong Li…
- 关键词：IrTe2 ; Transition metal dichalcogenide ; Scanning tunneling microscopy ; Density functional theory ; Charge density wave
- 刊名：Chinese Science Bulletin
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：60
- 期：8
- 页码：798-805
- 全文大小：1,924 KB
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31.Yan JQ, Saparov B, Sefat AS et al (2013) Ab - 作者单位：Wei Ruan (1)
Peizhe Tang (1)
Aifang Fang (2)
Peng Cai (1)
Cun Ye (1)
Xintong Li (1)
Wenhui Duan (1) (4)
Nanling Wang (3) (4)
Yayu Wang (1) (4)
1. State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China
2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
4. Collaborative Innovation Center of Quantum Matter, Beijing, 100084, China
3. International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China - 刊物主题：Science, general; Life Sciences, general; Physics, general; Chemistry/Food Science, general; Earth Sciences, general; Engineering, general;
- 出版者：Springer Berlin Heidelberg
- ISSN：1861-9541
文摘
The IrTe2 transition metal dichalcogenide undergoes a series of structural and electronic phase transitions when doped with Pt. The nature of each phase and the mechanism of the phase transitions have attracted much attention. In this paper, we report scanning tunneling microscopy and spectroscopy studies of Pt-doped IrTe2 with varied Pt contents. In pure IrTe2, we find that the ground state has a 1/6 superstructure, and the electronic structure is inconsistent with Fermi surface nesting-induced charge density wave order. Upon Pt doping, the crystal structure changes to a 1/5 superstructure and then to a quasi-periodic hexagonal phase. First-principles calculations show that the superstructures and electronic structures are determined by the global chemical strain and local impurity states that can be tuned systematically by Pt doping.