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Linear Magnetoresistance Caused by Mobility Fluctuations in n-Doped Cd3As2

A. Narayanan, M. D. Watson, S. F. Blake, N. Bruyant, L. Drigo, Y. L. Chen, D. Prabhakaran, B. Yan, C. Felser, T. Kong, P. C. Canfield, and A. I. Coldea
Phys. Rev. Lett. 114, 117201 – Published 19 March 2015
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Abstract

Cd3As2 is a candidate three-dimensional Dirac semimetal which has exceedingly high mobility and nonsaturating linear magnetoresistance that may be relevant for future practical applications. We report magnetotransport and tunnel diode oscillation measurements on Cd3As2, in magnetic fields up to 65 T and temperatures between 1.5 and 300 K. We find that the nonsaturating linear magnetoresistance persists up to 65 T and it is likely caused by disorder effects, as it scales with the high mobility rather than directly linked to Fermi surface changes even when approaching the quantum limit. From the observed quantum oscillations, we determine the bulk three-dimensional Fermi surface having signatures of Dirac behavior with a nontrivial Berry phase shift, very light effective quasiparticle masses, and clear deviations from the band-structure predictions. In very high fields we also detect signatures of large Zeeman spin splitting (g16).

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  • Received 12 December 2014

DOI:https://doi.org/10.1103/PhysRevLett.114.117201

© 2015 American Physical Society

Authors & Affiliations

A. Narayanan1, M. D. Watson1, S. F. Blake1, N. Bruyant2, L. Drigo2, Y. L. Chen1, D. Prabhakaran1, B. Yan3, C. Felser2, T. Kong4,5, P. C. Canfield4,5, and A. I. Coldea1,*

  • 1Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
  • 2Laboratoire National des Champs Magnetiques Intenses (CNRS), 31077 Toulouse, France
  • 3Max-Planck-Institut fur Chemische Physik fester Stoffe, 01187 Dresden, Germany
  • 4Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA
  • 5Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • *Corresponding author. amalia.coldea@physics.ox.ac.uk

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Issue

Vol. 114, Iss. 11 — 20 March 2015

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