Temperature-Induced Lifshitz Transition in WTe2

Yun Wu, Na Hyun Jo, Masayuki Ochi, Lunan Huang, Daixiang Mou, Sergey L. Bud’ko, P. C. Canfield, Nandini Trivedi, Ryotaro Arita, and Adam Kaminski
Phys. Rev. Lett. 115, 166602 – Published 12 October 2015
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Abstract

We use ultrahigh resolution, tunable, vacuum ultraviolet laser-based, angle-resolved photoemission spectroscopy (ARPES), temperature- and field-dependent resistivity, and thermoelectric power (TEP) measurements to study the electronic properties of WTe2, a compound that manifests exceptionally large, temperature-dependent magnetoresistance. The Fermi surface consists of two pairs of electron and two pairs of hole pockets along the XΓX direction. Using detailed ARPES temperature scans, we find a rare example of a temperature-induced Lifshitz transition at T160K, associated with the complete disappearance of the hole pockets. Our electronic structure calculations show a clear and substantial shift of the chemical potential μ(T) due to the semimetal nature of this material driven by modest changes in temperature. This change of Fermi surface topology is also corroborated by the temperature dependence of the TEP that shows a change of slope at T175K and a breakdown of Kohler’s rule in the 70–140 K range. Our results and the mechanisms driving the Lifshitz transition and transport anomalies are relevant to other systems, such as pnictides, 3D Dirac semimetals, and Weyl semimetals.

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  • Received 10 June 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.166602

© 2015 American Physical Society

Authors & Affiliations

Yun Wu1, Na Hyun Jo1, Masayuki Ochi2,3, Lunan Huang1, Daixiang Mou1, Sergey L. Bud’ko1, P. C. Canfield1,*, Nandini Trivedi4, Ryotaro Arita2,3, and Adam Kaminski1,†

  • 1Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
  • 2RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
  • 3JST ERATO Isobe Degenerate π-Integration Project, Advanced Institute for Materials Research (AIMR), Tohoku University, Sendai, Miyagi 980-8577, Japan
  • 4Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA

  • *canfield@ameslab.gov
  • kaminski@ameslab.gov

See Also

Signature of Strong Spin-Orbital Coupling in the Large Nonsaturating Magnetoresistance Material WTe2

J. Jiang, F. Tang, X. C. Pan, H. M. Liu, X. H. Niu, Y. X. Wang, D. F. Xu, H. F. Yang, B. P. Xie, F. Q. Song, P. Dudin, T. K. Kim, M. Hoesch, P. Kumar Das, I. Vobornik, X. G. Wan, and D. L. Feng
Phys. Rev. Lett. 115, 166601 (2015)

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Vol. 115, Iss. 16 — 16 October 2015

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