Cooper Pair Induced Frustration and Nematicity of Two-Dimensional Magnetic Adatom Lattices

ORAL

Abstract

We propose utilizing the Cooper pair to induce magnetic frustration in systems of two-dimensional (2D) magnetic adatom lattices on s-wave superconducting surfaces. The competition between singlet electron correlations and the RKKY coupling is shown to lead to a variety of hidden order states that break the point-group symmetry of the 2D adatom lattice at finite temperature. The phase diagram is constructed using a newly developed effective bond theory [M. Schecter et al., Phys. Rev. Lett. 119, 157202 (2017)], and exhibits broad regions of long-range vestigial nematic order.

*The Center for Quantum Devices is funded by the Danish National Research Foundation. We acknowledge support from the Villum Foundation, the Laboratory for Physical Sciences, and Microsoft (M.S.), and Grant No. 213606 from the Research Council of Norway (O.F.S.).

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Presenters

  • Jens Paaske

    • Niels Bohr Institute, University of Copenhagen
    • Niels Bohr Inst
    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

Authors

  • Jens Paaske

    • Niels Bohr Institute, University of Copenhagen
    • Niels Bohr Inst
    • Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen

  • Michael Schecter

    • Department of Physics, University of Maryland

  • Olav Syljuåsen

    • Department of Physics, University of Oslo
    • Physics, University of Oslo