Noncentrosymmetric Weyl phase and topological phase transition in bulk MoTe

2021 ◽  
Author(s):  
Jia-Fang Wu ◽  
Sha-Sha Ke ◽  
Yong Guo ◽  
Huai-Wu Zhang ◽  
Hai-Feng Lü
Keyword(s):  
Phase Transition ◽  
Type Ii ◽  
Topological Phase ◽  
Weyl Semimetal ◽  
Topological Phase Transition

Pm-MoTe without inversion centers is a Type-II Weyl semimetal with eight Weyl points, which can transition to compensation semimetal under strain.

scholarly journals Topological phase transition in a magnetic Weyl semimetal

2021 ◽  
Vol 104 (20) ◽  
Author(s):  
D. F. Liu ◽  
Q. N. Xu ◽  
E. K. Liu ◽  
J. L. Shen ◽  
C. C. Le ◽  
...  
Keyword(s):  
Phase Transition ◽  
Topological Phase ◽  
Weyl Semimetal ◽  
Topological Phase Transition

scholarly journals Topological phase transition between distinct Weyl semimetal states in MoTe2

2019 ◽  
Vol 100 (20) ◽  
Author(s):  
Anmin Zhang ◽  
Xiaoli Ma ◽  
Changle Liu ◽  
Rui Lou ◽  
Yimeng Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Topological Phase ◽  
Weyl Semimetal ◽  
Topological Phase Transition

scholarly journals Pressure-induced topological phase transition in noncentrosymmetric elemental tellurium

2019 ◽  
Vol 116 (51) ◽  
pp. 25530-25534 ◽  
Author(s):  
Toshiya Ideue ◽  
Motoaki Hirayama ◽  
Hiroaki Taiko ◽  
Takanari Takahashi ◽  
Masayuki Murase ◽  
...  
Keyword(s):  
Phase Transition ◽  
External Field ◽  
Topological Phase ◽  
Linear Dispersion ◽  
Electronic Band ◽  
Elemental Tellurium ◽  
Weyl Semimetal ◽  
Topological Phase Transition ◽  
Band Deformation ◽  
Band Crossing

Recent progress in understanding the electronic band topology and emergent topological properties encourage us to reconsider the band structure of well-known materials including elemental substances. Controlling such a band topology by external field is of particular interest from both fundamental and technological viewpoints. Here we report possible signatures of the pressure-induced topological phase transition from a semiconductor to a Weyl semimetal in elemental tellurium probed by transport measurements. Pressure variation of the periods of Shubnikov–de Haas oscillations, as well as oscillation phases, shows an anomaly around the pressure theoretically predicted for topological phase transition. This behavior is consistent with the pressure-induced band deformation and resultant band-crossing effect. Moreover, effective cyclotron mass is reduced toward the critical pressure, potentially reflecting the emergence of massless linear dispersion. The present result paves the way for studying the electronic band topology in well-known compounds and topological phase transition by the external field.

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