Strain induced topological Hall effect of SrRuO3 single-layered thin films

ORAL

Abstract

Topology in condensed matter physics has led to fruitful areas such as topological insulators, Majorana fermions and valleytronics. Among them, the topological Hall effect (THE) of magnetic materials has attracted much attention due to the discovery of magnetic skyrmions, a topologically protected spin texture that is promising for future magnetic/electronic devices. Recently, a THE has been observed at the interface between a ferromagnetic SrRuO3 (SRO) and a heavy metal SrIrO3 (SIO), although the spin texture of both bulk SRO and bulk SIO are topologically trivial. Here, we will demonstrate the discovery of an unexpected THE on perovskite SRO single-layered films stabilized by molecular beam epitaxy. We will show that the epitaxial strain in SRO films stabilizes a non-coplanar spin texture and leads to the topologically non-trivial phenomenon. SRO is a widely-used material in complex oxide heterostructures. Our results can potentially lead to major progresses in novel phenomena in SRO-based heterostructures as well as the applications of next generation all-oxide electronic and magnetic devices.

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Presenters

  • Ludi Miao

    Cornell University

Authors

  • Ludi Miao

    Cornell University

  • Hari Nair

    Cornell University, Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Nathaniel Schreiber

    Cornell University

  • Jacob P Ruf

    Cornell University, Department of Physics, Laboratory of Atomic and Solid State Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Yingfei Li

    Cornell University

  • Cyrus Zeledon

    Cornell University

  • Shengwei Jiang

    Cornell University, Applied and Engineering Physics, Cornell University

  • Berit Goodge

    Cornell University

  • Ismail El Baggari

    Cornell University

  • Kin Fai Mak

    Cornell University, Applied and Engineering Physics, Cornell University, Physics, Cornell University

  • Jie Shan

    Cornell University, Applied and Engineering Physics, Cornell University, Applied and engineering physics, Cornell University

  • Lena Kourkoutis

    Cornell University

  • Darrell G. Schlom

    Cornell University, Cornell University, Ithaca, New York 14853, USA, Department of Materials Science and Engineering, Cornell University, Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University, Materials Science & Engineering, Cornell University, Department of Materials Science and Engineering,, Cornell University, Materials Science and Engineering, University of Cornell

  • Kyle M Shen

    Cornell University, Department of Physics, Laboratory of Atomic and Solid State Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University