Interfacial Rashba magnetoresistance of two-dimensional electron gas at LaAlO${}_3$/SrTiO${}_3$ interface

Abstract

We report the angular dependence of magnetoresistance in two-dimensional electron gas at LaAlO${}_3$/SrTiO${}_3$ interface. We find that this interfacial magnetoresistance exhibits a similar angular dependence to the spin Hall magnetoresistance observed in ferromagnet/heavy metal bilayers, which has been so far discussed in the framework of bulk spin Hall effect of heavy metal layer. The observed magnetoresistance is in qualitative agreement with theoretical model calculation including both Rashba spin-orbit coupling and exchange interaction. Our result suggests that magnetic interfaces subject to spin-orbit coupling can generate a nonnegligible contribution to the spin Hall magnetoresistance and the interfacial spin-orbit coupling effect is therefore key to the understanding of various spin-orbit-coupling-related phenomena in magnetic/non-magnetic bilayers.

6 pages, 4 figures

References in corpus (10)

• Magnetic effects at the interface between nonmagnetic oxides
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Theory of spin Hall magnetoresistance
• Theory of spin-orbit coupling at LaAlO3/SrTiO3 interfaces and SrTiO3 surfaces
• Rashba-Edelstein Magnetoresistance in Metallic Heterostructure
• Rashba induced magnetoconductance oscillations in the LaAlO3-SrTiO3 heterostructure
• Giant negative magnetoresistance driven by spin-orbit coupling at the LAO/STO interface
• Angular dependence of spin-orbit spin transfer torques
• Intrinsic magnetoresistance in metal films on ferromagnetic insulators
• Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures

Cited by in corpus (1)

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