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Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO3-KTaO3 with strong spin-orbit coupling

Author

Listed:
  • Neha Wadehra

    (Institute of Nano Science and Technology)

  • Ruchi Tomar

    (Institute of Nano Science and Technology)

  • Rahul Mahavir Varma

    (Indian Institute of Science)

  • R. K. Gopal

    (Indian Institute of Science Education and Research Mohali)

  • Yogesh Singh

    (Indian Institute of Science Education and Research Mohali)

  • Sushanta Dattagupta

    (Bose Institute)

  • S. Chakraverty

    (Institute of Nano Science and Technology)

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.

Suggested Citation

  • Neha Wadehra & Ruchi Tomar & Rahul Mahavir Varma & R. K. Gopal & Yogesh Singh & Sushanta Dattagupta & S. Chakraverty, 2020. "Planar Hall effect and anisotropic magnetoresistance in polar-polar interface of LaVO3-KTaO3 with strong spin-orbit coupling," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14689-z
    DOI: 10.1038/s41467-020-14689-z
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    Cited by:

    1. Sara Varotto & Annika Johansson & Börge Göbel & Luis M. Vicente-Arche & Srijani Mallik & Julien Bréhin & Raphaël Salazar & François Bertran & Patrick Le Fèvre & Nicolas Bergeal & Julien Rault & Ingrid, 2022. "Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO3 interfaces," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Guanqun Zhang & Lijie Wang & Jinghui Wang & Guoan Li & Guangyi Huang & Guang Yang & Huanyi Xue & Zhongfeng Ning & Yueshen Wu & Jin-Peng Xu & Yanru Song & Zhenghua An & Changlin Zheng & Jie Shen & Jun , 2023. "Spontaneous rotational symmetry breaking in KTaO3 heterointerface superconductors," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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