Anisotropic magnetoresistance in spin–orbit semimetal SrIrO 3
Dirk J. Groenendijk (Kavli institute of nanoscience Delft, TU Delft - QN/Caviglia Lab)
N. Manca (Kavli institute of nanoscience Delft, TU Delft - QN/Caviglia Lab)
J. de Bruijckere (Kavli institute of nanoscience Delft, TU Delft - QN/van der Zant Lab)
A. M.R.V.L. Monteiro (Kavli institute of nanoscience Delft)
R. Gaudenzi (TU Delft - QN/van der Zant Lab, Kavli institute of nanoscience Delft)
H. S.J. van der Zant (TU Delft - QN/van der Zant Lab, Kavli institute of nanoscience Delft)
A Caviglia (TU Delft - QN/Caviglia Lab, Kavli institute of nanoscience Delft)
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Abstract
SrIrO 3, the three-dimensional member of the Ruddlesden–Popper iridates, is a paramagnetic semimetal characterised by a the delicate interplay between spin–orbit coupling and Coulomb repulsion. In this work, we study the anisotropic magnetoresistance (AMR) of SrIrO 3 thin films, which is closely linked to spin–orbit coupling and probes correlations between electronic transport, magnetic order and orbital states. We show that the low-temperature negative magnetoresistance is anisotropic with respect to the magnetic field orientation, and its angular dependence reveals the appearance of a fourfold symmetric component above a critical magnetic field. We show that this AMR component is of magnetocrystalline origin, and attribute the observed transition to a field-induced magnetic state in SrIrO 3.
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