Abstract:
:Among the perovskite oxide family, KTaO3 (KTO) has recently attracted considerable interest as a possible system for the realization of the Rashba effect. In this work, we report a novel conducting interface by placing KTO with another insulator, LaVO3 (LVO) and report planar Hall effect (PHE) and anisotropic magnetoresistance (AMR) measurements. This interface exhibits a signature of strong spin-orbit coupling. Our experimental observations of two fold AMR and PHE at low magnetic fields (B) is similar to those obtained for topological systems and can be intuitively understood using a phenomenological theory for a Rashba spin-split system. Our experimental data show a B2 dependence of AMR and PHE at low magnetic fields that could also be explained based on our model. At high fields (~8 T), we see a two fold to four fold transition in the AMR that could not be explained using only Rashba spin-split energy spectra.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wadehra N,Tomar R,Varma RM,Gopal RK,Singh Y,Dattagupta S,Chakraverty Sdoi
10.1038/s41467-020-14689-zsubject
Has Abstractpub_date
2020-02-13 00:00:00pages
874issue
1issn
2041-1723pii
10.1038/s41467-020-14689-zjournal_volume
11pub_type
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