title: Linear magnetoresistance caused by mobility fluctuations in n-doped Cd(3)As(2).
abstract: Cd(3)As(2) 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 Cd(3)As(2), 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 (g∼16).
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Narayanan
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: M D
authors.initials: MD
authors.lastname: Watson
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: S F
authors.initials: SF
authors.lastname: Blake
authors.affiliation: Laboratoire National des Champs Magnetiques Intenses (CNRS), 31077 Toulouse, France.
authors.forename: N
authors.initials: N
authors.lastname: Bruyant
authors.affiliation: Laboratoire National des Champs Magnetiques Intenses (CNRS), 31077 Toulouse, France.
authors.forename: L
authors.initials: L
authors.lastname: Drigo
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: Y L
authors.initials: YL
authors.lastname: Chen
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: D
authors.initials: D
authors.lastname: Prabhakaran
authors.affiliation: Max-Planck-Institut fur Chemische Physik fester Stoffe, 01187 Dresden, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Yan
authors.affiliation: Laboratoire National des Champs Magnetiques Intenses (CNRS), 31077 Toulouse, France.
authors.forename: C
authors.initials: C
authors.lastname: Felser
authors.affiliation: Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.|Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: T
authors.initials: T
authors.lastname: Kong
authors.affiliation: Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.|Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: P C
authors.initials: PC
authors.lastname: Canfield
authors.affiliation: Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: A I
authors.initials: AI
authors.lastname: Coldea