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Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures

Author

Listed:
  • Yi Zhang

    (University of California)

  • Lin Xie

    (Nanjing University)

  • Jeongwoo Kim

    (University of California)

  • Alex Stern

    (University of California)

  • Hui Wang

    (University of California)

  • Kui Zhang

    (University of California)

  • Xingxu Yan

    (University of California)

  • Linze Li

    (University of California)

  • Henry Liu

    (National Chiao Tung University)

  • Gejian Zhao

    (Arizona State University)

  • Hang Chi

    (University of Michigan)

  • Chaitanya Gadre

    (University of California)

  • Qiyin Lin

    (University of California)

  • Yichun Zhou

    (Xiangtan University)

  • Ctirad Uher

    (University of Michigan)

  • Tingyong Chen

    (Arizona State University)

  • Ying-Hao Chu

    (National Chiao Tung University)

  • Jing Xia

    (University of California)

  • Ruqian Wu

    (University of California)

  • Xiaoqing Pan

    (University of California
    University of California)

Abstract

Emergent physical properties often arise at interfaces of complex oxide heterostructures due to the interplay between various degrees of freedom, especially those with polar discontinuities. It is desirable to explore if these structures may generate pure and controllable spin currents, which are needed to attain unmatched performance and energy efficiency in the next-generation spintronic devices. Here we report the emergence of a spin-polarized two-dimensional electron gas (SP-2DEG) at the interface of two insulators, SrTiO3 and PbZr0.2Ti0.8O3. This SP-2DEG is strongly localized at the interfacial Ti atoms, due to the interplay between Coulomb interaction and band bending, and can be tuned by the ferroelectric polarization. Our findings open a door for engineering ferroelectric/insulator interfaces to create tunable ferroic orders for magnetoelectric device applications and provide opportunities for designing multiferroic materials in heterostructures.

Suggested Citation

  • Yi Zhang & Lin Xie & Jeongwoo Kim & Alex Stern & Hui Wang & Kui Zhang & Xingxu Yan & Linze Li & Henry Liu & Gejian Zhao & Hang Chi & Chaitanya Gadre & Qiyin Lin & Yichun Zhou & Ctirad Uher & Tingyong , 2018. "Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-02914-9
    DOI: 10.1038/s41467-018-02914-9
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