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Lifshitz Transitions Induced by Temperature and Surface Doping in Type-II Weyl Semimetal Candidate T d -WTe 2

DOI: 10.1002/pssr.201700209 DOI Help

Authors: Qihang Zhang (Tsinghua University) , Zhongkai Liu (ShanghaiTech University; CAS-Shanghai Science Research Center) , Yan Sun (Max Planck Institute for Chemical Physics of Solids) , Haifeng Yang (University of Oxford; Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences) , Juan Jiang (ShanghaiTech University; CAS-Shanghai Science Research Center; University of Oxford; Advanced Light Source; Pohang Accelerator Laboratory POSTECH) , Sung-kwan Mo (Advanced Light Source) , Zahid Hussain (Advanced Light Source) , Xiaofeng Qian (Texas A&M University) , Liang Fu (Massachusetts Institute of Technology) , Shuhua Yao (Nanjing University) , Minghui Lu (Nanjing University) , Claudia Felser (Max Planck Institute for Chemical Physics of Solids) , Binghai Yan (Max Planck Institute for Chemical Physics of Solids) , Yulin Chen (Tsinghua University; ShanghaiTech University; CAS-Shanghai Science Research Center; University of Oxford) , Lexian Yang (Tsinghua University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physica Status Solidi (rrl) - Rapid Research Letters , VOL 83

State: Published (Approved)
Published: October 2017
Diamond Proposal Number(s): 16846

Abstract: Using high resolution angle-resolved photoemission spectroscopy, we systematically investigate the electronic structure of Td-WTe2, 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 Td-WTe2 at temperatures below 10‚ÄČK. We also investigate the evolution of the electronic structure of Td-WTe2 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 Td-WTe2, but also provide a promising method to manipulate the electronic structures and physical properties of the type-II TWS Td-XTe2.

Journal Keywords: angle-resolved photoemission spectroscopy; band reconstruction; Lifshitz transition; type-II Weyl semimetal

Subject Areas: Physics


Instruments: I05-ARPES

Other Facilities: Advanced Light Source