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Nonzero Berry phase in quantum oscillations from giant Rashba-type spin splitting in LaTiO3/SrTiO3 heterostructures

Author

Listed:
  • M. J. Veit

    (Stanford University)

  • R. Arras

    (University of Toulouse, CNRS, UPS)

  • B. J. Ramshaw

    (Los Alamos National Laboratory
    Cornell University)

  • R. Pentcheva

    (University of Duisburg-Essen)

  • Y. Suzuki

    (Stanford University)

Abstract

The manipulation of the spin degrees of freedom in a solid has been of fundamental and technological interest recently for developing high-speed, low-power computational devices. There has been much work focused on developing highly spin-polarized materials and understanding their behavior when incorporated into so-called spintronic devices. These devices usually require spin splitting with magnetic fields. However, there is another promising strategy to achieve spin splitting using spatial symmetry breaking without the use of a magnetic field, known as Rashba-type splitting. Here we report evidence for a giant Rashba-type splitting at the interface of LaTiO3 and SrTiO3. Analysis of the magnetotransport reveals anisotropic magnetoresistance, weak anti-localization and quantum oscillation behavior consistent with a large Rashba-type splitting. It is surprising to find a large Rashba-type splitting in 3d transition metal oxide-based systems such as the LaTiO3/SrTiO3 interface, but it is promising for the development of a new kind of oxide-based spintronics.

Suggested Citation

  • M. J. Veit & R. Arras & B. J. Ramshaw & R. Pentcheva & Y. Suzuki, 2018. "Nonzero Berry phase in quantum oscillations from giant Rashba-type spin splitting in LaTiO3/SrTiO3 heterostructures," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04014-0
    DOI: 10.1038/s41467-018-04014-0
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    Cited by:

    1. Shingo Kaneta-Takada & Miho Kitamura & Shoma Arai & Takuma Arai & Ryo Okano & Le Duc Anh & Tatsuro Endo & Koji Horiba & Hiroshi Kumigashira & Masaki Kobayashi & Munetoshi Seki & Hitoshi Tabata & Masaa, 2022. "Giant spin-to-charge conversion at an all-epitaxial single-crystal-oxide Rashba interface with a strongly correlated metal interlayer," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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