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Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling

Among the perovskite oxide family, KTaO(3) (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, LaVO(3) (LVO) and report planar Hall effect (PHE) a...

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Autores principales: Wadehra, Neha, Tomar, Ruchi, Varma, Rahul Mahavir, Gopal, R. K., Singh, Yogesh, Dattagupta, Sushanta, Chakraverty, S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7018836/
https://www.ncbi.nlm.nih.gov/pubmed/32054860
http://dx.doi.org/10.1038/s41467-020-14689-z
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author Wadehra, Neha
Tomar, Ruchi
Varma, Rahul Mahavir
Gopal, R. K.
Singh, Yogesh
Dattagupta, Sushanta
Chakraverty, S.
author_facet Wadehra, Neha
Tomar, Ruchi
Varma, Rahul Mahavir
Gopal, R. K.
Singh, Yogesh
Dattagupta, Sushanta
Chakraverty, S.
author_sort Wadehra, Neha
collection PubMed
description Among the perovskite oxide family, KTaO(3) (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, LaVO(3) (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 B(2) 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.
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spelling pubmed-70188362020-02-21 Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling Wadehra, Neha Tomar, Ruchi Varma, Rahul Mahavir Gopal, R. K. Singh, Yogesh Dattagupta, Sushanta Chakraverty, S. Nat Commun Article Among the perovskite oxide family, KTaO(3) (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, LaVO(3) (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 B(2) 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. Nature Publishing Group UK 2020-02-13 /pmc/articles/PMC7018836/ /pubmed/32054860 http://dx.doi.org/10.1038/s41467-020-14689-z Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wadehra, Neha
Tomar, Ruchi
Varma, Rahul Mahavir
Gopal, R. K.
Singh, Yogesh
Dattagupta, Sushanta
Chakraverty, S.
Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title_full Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title_fullStr Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title_full_unstemmed Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title_short Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO(3)-KTaO(3) with strong spin-orbit coupling
title_sort planar hall effect and anisotropic magnetoresistance in polar-polar interface of lavo(3)-ktao(3) with strong spin-orbit coupling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7018836/
https://www.ncbi.nlm.nih.gov/pubmed/32054860
http://dx.doi.org/10.1038/s41467-020-14689-z
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