Pressure-induced Td to 1T' structural phase transition in WTe2

Yonghui Zhou; Xuliang Chen; Nana Li; Ranran Zhang; Xuefei Wang; Chao An; Ying Zhou; Xingchen Pan; Fengqi Song; Baigeng Wang; Wenge Yang; Zhaorong Yang; Yuheng Zhang

doi:10.1063/1.4959026

Pressure-induced Td to 1T' structural phase transition in WTe₂

Yonghui Zhou, Xuliang Chen, Nana Li, Ranran Zhang, Xuefei Wang, Chao An, Ying Zhou, Xingchen Pan, Fengqi Song, Baigeng Wang, Wenge Yang, Zhaorong Yang, Yuheng Zhang

研究成果: Article › 査読

47 被引用数 (Scopus)

抄録

WTe₂ is provoking immense interest owing to its extraordinary properties, such as large positive magnetoresistance, pressure-driven superconductivity and possible type-II Weyl semimetal state. Here we report results of high-pressure synchrotron X-ray diffraction (XRD), Raman and electrical transport measurements on WTe₂. Both the XRD and Raman results reveal a structural transition upon compression, starting at 6.0 GPa and completing above 15.5 GPa. We have determined that the high-pressure lattice symmetry is monoclinic 1T' with space group of P2₁/m. This transition is related to a lateral sliding of adjacent Te-W-Te layers and results in a collapse of the unit cell volume by ∼20.5%. The structural transition also casts a pressure range with the broadened superconducting transition, where the zero resistance disappears.

本文言語	English
論文番号	075008
ジャーナル	AIP Advances
巻	6
号	7
DOI	https://doi.org/10.1063/1.4959026
出版ステータス	Published - 2016 7月 1
外部発表	はい

ASJC Scopus subject areas

物理学および天文学（全般）

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10.1063/1.4959026

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title = "Pressure-induced Td to 1T' structural phase transition in WTe2",

abstract = "WTe2 is provoking immense interest owing to its extraordinary properties, such as large positive magnetoresistance, pressure-driven superconductivity and possible type-II Weyl semimetal state. Here we report results of high-pressure synchrotron X-ray diffraction (XRD), Raman and electrical transport measurements on WTe2. Both the XRD and Raman results reveal a structural transition upon compression, starting at 6.0 GPa and completing above 15.5 GPa. We have determined that the high-pressure lattice symmetry is monoclinic 1T' with space group of P21/m. This transition is related to a lateral sliding of adjacent Te-W-Te layers and results in a collapse of the unit cell volume by ∼20.5%. The structural transition also casts a pressure range with the broadened superconducting transition, where the zero resistance disappears.",

author = "Yonghui Zhou and Xuliang Chen and Nana Li and Ranran Zhang and Xuefei Wang and Chao An and Ying Zhou and Xingchen Pan and Fengqi Song and Baigeng Wang and Wenge Yang and Zhaorong Yang and Yuheng Zhang",

note = "Funding Information: This work was financially supported by the National Key Projects for Basic Research of China (Grant Nos: 2013CB922103), the National Natural Science Foundation of China (Grant Nos: U1332143, 11574323, 91421109, 11522432, U1530402, 51527801), NSF Jiangsu province (No. BK20130054), and the Fundamental Research Funds for the Central Universities. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA under Award No. DE-NA0001974 and DOE-BES under Award No. DE-FG02-99ER45775, with partial instrumentation funding by NSF. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Publisher Copyright: {\textcopyright} 2016 Author(s).",

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AU - Zhou, Yonghui

AU - Chen, Xuliang

AU - Li, Nana

AU - Zhang, Ranran

AU - Wang, Xuefei

AU - An, Chao

AU - Zhou, Ying

AU - Pan, Xingchen

AU - Song, Fengqi

AU - Wang, Baigeng

AU - Yang, Wenge

AU - Yang, Zhaorong

AU - Zhang, Yuheng

N1 - Funding Information: This work was financially supported by the National Key Projects for Basic Research of China (Grant Nos: 2013CB922103), the National Natural Science Foundation of China (Grant Nos: U1332143, 11574323, 91421109, 11522432, U1530402, 51527801), NSF Jiangsu province (No. BK20130054), and the Fundamental Research Funds for the Central Universities. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source (APS), Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA under Award No. DE-NA0001974 and DOE-BES under Award No. DE-FG02-99ER45775, with partial instrumentation funding by NSF. The Advanced Photon Source is a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Publisher Copyright: © 2016 Author(s).

PY - 2016/7/1

Y1 - 2016/7/1

N2 - WTe2 is provoking immense interest owing to its extraordinary properties, such as large positive magnetoresistance, pressure-driven superconductivity and possible type-II Weyl semimetal state. Here we report results of high-pressure synchrotron X-ray diffraction (XRD), Raman and electrical transport measurements on WTe2. Both the XRD and Raman results reveal a structural transition upon compression, starting at 6.0 GPa and completing above 15.5 GPa. We have determined that the high-pressure lattice symmetry is monoclinic 1T' with space group of P21/m. This transition is related to a lateral sliding of adjacent Te-W-Te layers and results in a collapse of the unit cell volume by ∼20.5%. The structural transition also casts a pressure range with the broadened superconducting transition, where the zero resistance disappears.

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