Electrical transport properties of Weyl semimetal WTe2 under high pressure

Tungsten ditelluride (WTe 2 ) has recently become one of the most extensively investigated materials as a Weyl semimetal with an orthorhombic T d phase due to its unique properties, including its pressure-induced superconductivity and unsaturated giant magnetoresistance. The electrical resistivity,...

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Bibliographic Details
Published in:Journal of materials science 2020-10, Vol.55 (30), p.14873-14882
Main Authors: Li, Yuqiang, Liu, Jingxia, Zhang, Peiguang, Zhang, Jianxin, Xiao, Ningru, Yu, Liyuan, Niu, Pingjuan
Format: Article
Language:English
Subjects:
Carrier density
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electrical resistivity
Electronic Materials
Giant magnetoresistance
Hall effect
In situ measurement
Magnetic properties
Magnetoresistivity
Materials Science
Phase transitions
Photoconductivity
Polymer Sciences
Solid Mechanics
Superconductivity
Transition pressure
Transport properties
Tungsten
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Summary:Tungsten ditelluride (WTe 2 ) has recently become one of the most extensively investigated materials as a Weyl semimetal with an orthorhombic T d phase due to its unique properties, including its pressure-induced superconductivity and unsaturated giant magnetoresistance. The electrical resistivity, photoconductivity, and Hall effect under high pressures are considered in WTe 2 using in situ measurements up to 40 GPa. The structural phase transition is reflected from the T d to 1 T ′ phase at approximately 11 GPa based on the discontinuous electrical parameters. The abrupt increase of resistivity is caused by a joint decrease in the carrier concentration and mobility. The semimetal-to-semiconductor transition is apparent at around 11 GPa based on the resistivity measurements under different temperatures, and the transition is reversible due to the structural phase transition. The photoconductivity is much higher than the conductivity, and the phase transition pressure is lower at approximately 9.6 GPa. Graphic abstract Electrical transport properties of Weyl Semimetal WTe 2 are investigated under high pressure, and pressure-induced semiconductor transition is confirmed.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-05045-z