Quasilinear quantum magnetoresistance in pressure-induced nonsymmorphic superconductor chromium arsenide

Access this Article

Abstract

In conventional metals, modification of electron trajectories under magnetic field gives rise to a magnetoresistance that varies quadratically at low field, followed by a saturation at high field for closed orbits on the Fermi surface. Deviations from the conventional behaviour, for example, the observation of a linear magnetoresistance, or a non-saturating magnetoresistance, have been attributed to exotic electron scattering mechanisms. Recently, linear magnetoresistance has been observed in many Dirac materials, in which the electron-electron correlation is relatively weak. The strongly correlated helimagnet CrAs undergoes a quantum phase transition to a nonmagnetic superconductor under pressure. Here we observe, near the magnetic instability, a large and non-saturating quasilinear magnetoresistance from the upper critical field to 14 T at low temperatures. We show that the quasilinear magnetoresistance may arise from an intricate interplay between a nontrivial band crossing protected by nonsymmorphic crystal symmetry and strong magnetic fluctuations.

Journal

  • Nature Communications

    Nature Communications (8), 15358, 2017-06-05

    Nature Publishing Group

Codes

  • NII Article ID (NAID)
    120006360184
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    2041-1723
  • Data Source
    IR 
Page Top