Magnetic and orbital order in 2D electron gases at (111) oxide surfaces and interfaces

ORAL

Abstract

Recent experiments have explored two-dimensional electron gases (2DEGs) at oxide (111) surfaces and interfaces. We discuss many-body instabilities of such (111) 2DEGs, incorporating multiorbital interactions in the t2g manifold which can induce diverse magnetic and orbital orders. Such broken symmetries may lead to electronic nematicity in transport, which could cooperate or compete with phonon mechanisms. We present an effective field theory for the interplay of magnetism and nematic charge order, and discuss implications of the nematicity for transport in (111) 2DEGs.

*This research was funded by the Natural Sciences and Engineering Research Council of Canada and the Canadian Institute for Advanced Research.

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Presenters

  • Nazim Boudjada

    • Physics, Univ of Toronto

Authors

  • Nazim Boudjada

    • Physics, Univ of Toronto

  • Gideon Wachtel

    • Racah Institute of Physics, Hebrew University of Jerusalem
    • University of Toronto

  • Arun Paramekanti

    • University of Toronto
    • Physics, Univ of Toronto
    • Department of Physics, Univ of Toronto