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TT: Fachverband Tiefe Temperaturen

TT 30: Superconductivity: Poster Session

TT 30.3: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P1

Feedback of non-local d_xy nematicity on the magnetic anisotropy in FeSe — •Steffen Bötzel and Ilya Eremin — Institut für theoretische Physik III, Ruhr-Universität Bochum, Bochum, Germany

Details of the nematic state in FeSe and its connection to superconductivity are still a matter of debate. We analyze theoretically the magnetic anisotropy in this state by computing the spin and the orbital susceptibilities from a microscopic multiorbital model. In particular, we consider both the xz/yz and the recently proposed non-local xy nematic ordering. The latter is believed to have a significant impact on the bandstructure and to force a Lifshitz transition. Its inclusion could play a crucial role in reproducing the experimentally measured temperature dependence of the magnetic anisotropy. This provides a direct fingerprint of the different nematic scenarios on the magnetic properties of FeSe.