Gemeinsames TKM-TFP Seminar

  • Datum:

    Montag, 14.00-15.30 Uhr

  • Referent:

    Garst, Mirlin, Rockstuhl, Schmalian, Shnirman

  • Ort:

    10-01

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

Seminar über Theoretische Festkörperphysik
Vortragender:

Jens Paaske

 Datum:

14.05.2018 14:00
Ort:

Room 10.01, 10th Floor, Bldg. 30.23, KIT Campus South

 Zugehörigkeit:

Niels Bohr Institute, Copenhagen
Gastgeber:

Prof. Dr. Alexander Shnirman

Abstract

In this talk, I will argue that Cooper pairs can 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. Using a newly developed effective bond theory [1, 2], we have constructed the corresponding phase diagram, which displays broad regions of long-range vestigial nematic order.

[1] M. Schecter, O. F. Syljuåsen, J. Paaske, Phys. Rev. Lett. 119, 157202 (2017)
[2] M. Schecter, O. F. Syljuåsen, J. Paaske, arXiv:1710.08439