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Lifshitz Transitions Induced by Temperature and Surface Doping in Type‐II Weyl Semimetal Candidate T d ‐WTe 2
Author(s) -
Zhang Qihang,
Liu Zhongkai,
Sun Yan,
Yang Haifeng,
Jiang Juan,
Mo SungKwan,
Hussain Zahid,
Qian Xiaofeng,
Fu Liang,
Yao Shuhua,
Lu Minghui,
Felser Claudia,
Yan Binghai,
Chen Yulin,
Yang Lexian
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700209
Subject(s) - weyl semimetal , angle resolved photoemission spectroscopy , condensed matter physics , semimetal , electronic structure , photoemission spectroscopy , doping , ab initio , lattice (music) , type (biology) , x ray photoelectron spectroscopy , ab initio quantum chemistry methods , materials science , physics , nuclear magnetic resonance , quantum mechanics , band gap , ecology , molecule , acoustics , biology
Using high resolution angle‐resolved photoemission spectroscopy, we systematically investigate the electronic structure of T d ‐WTe 2 , which has attracted substantial research attention due to its diverse and fascinating properties, especially the predicted type‐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 type‐II TWS phase in T d ‐WTe 2 at temperatures below 10 K. We also investigate the evolution of the electronic structure of T d ‐WTe 2 and realize two‐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 ‐WTe 2 , but also provide a promising method to manipulate the electronic structures and physical properties of the type‐II TWS T d ‐ X Te 2 .