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Title: Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate Td-WTe2

Abstract

Using high resolution angleโ€resolved photoemission spectroscopy, we systematically investigate the electronic structure of T d โ€WTe 2 , which has attracted substantial research attention due to its diverse and fascinating properties, especially the predicted typeโ€II topological Weyl semimetal (TWS) phase. The observed significant lattice contraction and the fact that our ARPES measurements are well reproduced by our ab initio calculations under reduced lattice constants support the theoretical prediction of a typeโ€II TWS phase in T d โ€WTe 2 at temperatures below 10โ€‰K. We also investigate the evolution of the electronic structure of T d โ€WTe 2 and realize twoโ€stage Lifshitz transitions induced by temperature regulation and surface modification, respectively. Our results not only shed light on the understanding of the electronic structure of T d โ€WTe 2 , but also provide a promising method to manipulate the electronic structures and physical properties of the typeโ€II TWS T d โ€ X Te 2 .

Authors:
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [7];  [8];  [9];  [9];  [3];  [3];  [10]; ORCiD logo [1]
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  1. Tsinghua Univ., Beijing (People's Republic of China)
  2. ShanghaiTech Univ. and CAS-Shanghai Science Research Center, Shanghai (People's Republic of China)
  3. Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
  4. Univ. of Oxford, Oxford (United Kingdom); Chinese Academy of Sciences, Shanghai (People's Republic of China)
  5. ShanghaiTech Univ. and CAS-Shanghai Science Research Center, Shanghai (People's Republic of China); Univ. of Oxford, Oxford (United Kingdom); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pohang Accelerator Lab POSTECH, Pohang (Korea)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Texas A&M Univ., College Station, TX (United States)
  8. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  9. Nanjing Univ., Nanjing (People's Republic of China)
  10. Tsinghua Univ., Beijing (People's Republic of China); ShanghaiTech Univ. and CAS-Shanghai Science Research Center, Shanghai (People's Republic of China); Univ. of Oxford, Oxford (United Kingdom)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1530308
Alternate Identifier(s):
OSTI ID: 1398739
Grant/Contract Number:  
AC02-05CH11231; DEโ€AC02โ€05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physica Status Solidi rrl
Additional Journal Information:
Journal Volume: 11; Journal Issue: 12; Journal ID: ISSN 1862-6254
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; angleโ€resolved photoemission spectroscopy; band reconstruction; Lifshitz transition; typeโ€II Weyl semimetal

Citation Formats

Zhang, Qihang, Liu, Zhongkai, Sun, Yan, Yang, Haifeng, Jiang, Juan, Mo, Sung -Kwan, Hussain, Zahid, Qian, Xiaofeng, Fu, Liang, Yao, Shuhua, Lu, Minghui, Felser, Claudia, Yan, Binghai, Chen, Yulin, and Yang, Lexian. Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate Td-WTe2. United States: N. p., 2017. Web. doi:10.1002/pssr.201700209.
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Zhang, Qihang, Liu, Zhongkai, Sun, Yan, Yang, Haifeng, Jiang, Juan, Mo, Sung -Kwan, Hussain, Zahid, Qian, Xiaofeng, Fu, Liang, Yao, Shuhua, Lu, Minghui, Felser, Claudia, Yan, Binghai, Chen, Yulin, & Yang, Lexian. Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate Td-WTe2. United States. https://doi.org/10.1002/pssr.201700209
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Zhang, Qihang, Liu, Zhongkai, Sun, Yan, Yang, Haifeng, Jiang, Juan, Mo, Sung -Kwan, Hussain, Zahid, Qian, Xiaofeng, Fu, Liang, Yao, Shuhua, Lu, Minghui, Felser, Claudia, Yan, Binghai, Chen, Yulin, and Yang, Lexian. Mon . "Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate Td-WTe2". United States. https://doi.org/10.1002/pssr.201700209. https://www.osti.gov/servlets/purl/1530308.
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@article{osti_1530308,
title = {Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate Td-WTe2},
author = {Zhang, Qihang and Liu, Zhongkai and Sun, Yan and Yang, Haifeng and Jiang, Juan and Mo, Sung -Kwan and Hussain, Zahid and Qian, Xiaofeng and Fu, Liang and Yao, Shuhua and Lu, Minghui and Felser, Claudia and Yan, Binghai and Chen, Yulin and Yang, Lexian},
abstractNote = {Using high resolution angleโ€resolved photoemission spectroscopy, we systematically investigate the electronic structure of T d โ€WTe 2 , which has attracted substantial research attention due to its diverse and fascinating properties, especially the predicted typeโ€II topological Weyl semimetal (TWS) phase. The observed significant lattice contraction and the fact that our ARPES measurements are well reproduced by our ab initio calculations under reduced lattice constants support the theoretical prediction of a typeโ€II TWS phase in T d โ€WTe 2 at temperatures below 10โ€‰K. We also investigate the evolution of the electronic structure of T d โ€WTe 2 and realize twoโ€stage Lifshitz transitions induced by temperature regulation and surface modification, respectively. Our results not only shed light on the understanding of the electronic structure of T d โ€WTe 2 , but also provide a promising method to manipulate the electronic structures and physical properties of the typeโ€II TWS T d โ€ X Te 2 .},
doi = {10.1002/pssr.201700209},
journal = {Physica Status Solidi rrl},
number = 12,
volume = 11,
place = {United States},
year = {Mon Oct 09 00:00:00 EDT 2017},
month = {Mon Oct 09 00:00:00 EDT 2017}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1002/pssr.201700209
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Cited by: 14 works
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Figures / Tables:

Fig. 1 Fig. 1: Basic characterization of Td-WTe2. (A) The quasi-1D crystal structure of Td-WTe2. The W atoms form zigzag chains in the b direction and the flat Te layers winkles to compensate the lattice distortion. (B) The lattice constants of WTe2 as a function of temperature. (C) Core level photoemission spectrummore » of WTe2 showing characteristic Te 4d and W 4f peaks. (D) Fermi surface in multiple BZs showing the quasi-1D fermiology of Td-WTe2. (E) The predicted locations of Weyl points (WP) in the projected surface BZ. The Weyl points with different chirality is indicated by different colors. (F) The calculated band structure of Td-WTe2 near the Weyl points along cut #1 as marked in panel e. The solid blue curves are the calculated bulk bands. (G) (i),Calculated constant energy contour of WTe2 at 55 meV above the Fermi energy (EF). (ii), The zoom-in plot shows the surface Fermi arc (green curve) connecting the electron and hole pockets.« less
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