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Multiferroicity in plastically deformed SrTiO3

Author

Listed:
  • Xi Wang

    (Bar-Ilan University
    Bar-Ilan University)

  • Anirban Kundu

    (Ariel University)

  • Bochao Xu

    (University of Connecticut)

  • Sajna Hameed

    (University of Minnesota
    Max Planck Institute for Solid State Research)

  • Nadav Rothem

    (Bar-Ilan University
    Bar-Ilan University)

  • Shai Rabkin

    (Bar-Ilan University
    Bar-Ilan University)

  • Luka Rogić

    (University of Zagreb)

  • Liam Thompson

    (University of Minnesota)

  • Alexander McLeod

    (University of Minnesota)

  • Martin Greven

    (University of Minnesota)

  • Damjan Pelc

    (University of Zagreb)

  • Ilya Sochnikov

    (University of Connecticut
    University of Connecticut
    University of Connecticut)

  • Beena Kalisky

    (Bar-Ilan University
    Bar-Ilan University)

  • Avraham Klein

    (Ariel University)

Abstract

Quantum materials have a fascinating tendency to manifest novel and unexpected electronic states upon proper manipulation. Ideally, such manipulation should induce strong and irreversible changes and lead to new relevant length scales. Plastic deformation introduces large numbers of dislocations into a material, which can organize into extended structures and give rise to qualitatively new physics as a result of the huge localized strains. However, this approach is largely unexplored in the context of quantum materials, which are traditionally grown to be as pristine and clean as possible. Here we show that plastic deformation induces robust magnetism in the quantum paraelectric SrTiO3, a property that is completely absent in the pristine material. We combine scanning magnetic measurements and near-field optical microscopy to find that the magnetic order is localized along dislocation walls and coexists with ferroelectric order along the walls. The magnetic signals can be switched on and off via external stress and altered by external electric fields, which demonstrates that plastically deformed SrTiO3 is a quantum multiferroic. These results establish plastic deformation as a versatile knob for the manipulation of the electronic properties of quantum materials.

Suggested Citation

  • Xi Wang & Anirban Kundu & Bochao Xu & Sajna Hameed & Nadav Rothem & Shai Rabkin & Luka Rogić & Liam Thompson & Alexander McLeod & Martin Greven & Damjan Pelc & Ilya Sochnikov & Beena Kalisky & Avraham, 2024. "Multiferroicity in plastically deformed SrTiO3," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51615-z
    DOI: 10.1038/s41467-024-51615-z
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    References listed on IDEAS

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