Tunable structural phase transition and superconductivity in the Weyl semimetal Mo1-x Wx Te2

R. Dahal; L. Z. Deng; N. Poudel; M. Gooch; Z. Wu; H. C. Wu; H. D. Yang; C. K. Chang; C. W. Chu

doi:10.1103/PhysRevB.101.140505

Tunable structural phase transition and superconductivity in the Weyl semimetal Mo1-x Wx Te2

R. Dahal, L. Z. Deng, N. Poudel, M. Gooch, Z. Wu, H. C. Wu, H. D. Yang, C. K. Chang, C. W. Chu

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Abstract

The relationship among structural transition, superconductivity, and doping in the Weyl semimetal Mo1-xWxTe2 has been established through a systematic study of the doping and pressure effects. Doping-dependent resistivity measurements at ambient pressure revealed that the structural transition temperature increases linearly with increasing W content in Mo1-xWxTe2. The observed structural transition temperature (Ts) of MoTe2 at ambient pressure is 249 K and that of WTe2 is 613 K. Temperature-dependent synchrotron X-ray diffraction measurements further confirmed the structural transition in WTe2 at ambient pressure. Pressure was found to continuously suppress the Ts in Mo0.90W0.10Te2,Mo0.60W0.40Te2, and Mo0.25W0.75Te2, and superconductivity emerges in Mo0.90W0.10Te2 and Mo0.60W0.40Te2 above 1.25 K when Ts is suppressed to a lower temperature.

Original language	English
Article number	140505
Journal	Physical Review B
Volume	101
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.101.140505
Publication status	Published - 2020 Apr 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Tunable structural phase transition and superconductivity in the Weyl semimetal Mo1-x Wx Te2",

abstract = "The relationship among structural transition, superconductivity, and doping in the Weyl semimetal Mo1-xWxTe2 has been established through a systematic study of the doping and pressure effects. Doping-dependent resistivity measurements at ambient pressure revealed that the structural transition temperature increases linearly with increasing W content in Mo1-xWxTe2. The observed structural transition temperature (Ts) of MoTe2 at ambient pressure is 249 K and that of WTe2 is 613 K. Temperature-dependent synchrotron X-ray diffraction measurements further confirmed the structural transition in WTe2 at ambient pressure. Pressure was found to continuously suppress the Ts in Mo0.90W0.10Te2,Mo0.60W0.40Te2, and Mo0.25W0.75Te2, and superconductivity emerges in Mo0.90W0.10Te2 and Mo0.60W0.40Te2 above 1.25 K when Ts is suppressed to a lower temperature.",

author = "R. Dahal and Deng, {L. Z.} and N. Poudel and M. Gooch and Z. Wu and Wu, {H. C.} and Yang, {H. D.} and Chang, {C. K.} and Chu, {C. W.}",

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doi = "10.1103/PhysRevB.101.140505",

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T1 - Tunable structural phase transition and superconductivity in the Weyl semimetal Mo1-x Wx Te2

AU - Dahal, R.

AU - Deng, L. Z.

AU - Poudel, N.

AU - Gooch, M.

AU - Wu, Z.

AU - Wu, H. C.

AU - Yang, H. D.

AU - Chang, C. K.

AU - Chu, C. W.

PY - 2020/4/1

Y1 - 2020/4/1

N2 - The relationship among structural transition, superconductivity, and doping in the Weyl semimetal Mo1-xWxTe2 has been established through a systematic study of the doping and pressure effects. Doping-dependent resistivity measurements at ambient pressure revealed that the structural transition temperature increases linearly with increasing W content in Mo1-xWxTe2. The observed structural transition temperature (Ts) of MoTe2 at ambient pressure is 249 K and that of WTe2 is 613 K. Temperature-dependent synchrotron X-ray diffraction measurements further confirmed the structural transition in WTe2 at ambient pressure. Pressure was found to continuously suppress the Ts in Mo0.90W0.10Te2,Mo0.60W0.40Te2, and Mo0.25W0.75Te2, and superconductivity emerges in Mo0.90W0.10Te2 and Mo0.60W0.40Te2 above 1.25 K when Ts is suppressed to a lower temperature.

AB - The relationship among structural transition, superconductivity, and doping in the Weyl semimetal Mo1-xWxTe2 has been established through a systematic study of the doping and pressure effects. Doping-dependent resistivity measurements at ambient pressure revealed that the structural transition temperature increases linearly with increasing W content in Mo1-xWxTe2. The observed structural transition temperature (Ts) of MoTe2 at ambient pressure is 249 K and that of WTe2 is 613 K. Temperature-dependent synchrotron X-ray diffraction measurements further confirmed the structural transition in WTe2 at ambient pressure. Pressure was found to continuously suppress the Ts in Mo0.90W0.10Te2,Mo0.60W0.40Te2, and Mo0.25W0.75Te2, and superconductivity emerges in Mo0.90W0.10Te2 and Mo0.60W0.40Te2 above 1.25 K when Ts is suppressed to a lower temperature.

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Tunable structural phase transition and superconductivity in the Weyl semimetal Mo1-x Wx Te2

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