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      https://www.ias.ac.in/article/fulltext/boms/044/0269

    • Keywords

       

      Perovskite oxides; strong spin-orbit coupling; Rashba effect; quasi 2-dimensional electron gas; Berry’s phase; Shubnikov-de Haas oscillations.

    • Abstract

       

      With an ever intensifying hunt for quantum materials with integrated functionalities, transition metal oxides provide a simple yet rich option to explore. In this article, we bring out the potential of a perovskite oxide KTaO$_3$ (KTO)as a candidate for future generation quantum technologies as well as a hunting ground to understand the topological effects in oxides. We show that the heterostructures of insulating KTO with other insulating oxides LaVO$_3$ (LVO) andEuO are not only conducting, but have strong spin-orbit coupling leading to momentum-dependent spin-splitting—the Rashba effect. In LVO–KTO, the Rashba spin-split bands are shown to give rise to anisotropic magnetoresistance and planar Hall effect, while in EuO–KTO, a non-trivial Berry’s phase analysed from the quantum Shubnikov-de Haas oscillations is observed.

    • Author Affiliations

       

      NEHA WADEHRA1 2 SUVANKAR CHAKRAVERTY1

      1. Nanoscale Physics and Device Laboratory, Quantum Materials and Devices Unit, Institute of Nano Science and Technology, Knowledge City, S.A.S. Nagar, Mohali 140306, India
      2. Department of Materials Science and Engineering, Cornell University, Ithaca 14853, USA
    • Dates

       
  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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