Browsing by Author "Kummer, Kurt"

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      Electronic Structure and Coexistence of Superconductivity with Magnetism in RbEuFe4As4 

      Kim, Timur K.; Pervakov, K. S.; Evtushinsky, D. V.; Jung, S. W.; Poelchen, Georg; Kummer, Kurt; Vlasenko, V. A.; Sadakov, Andrey V.; Usoltsev, A. S.; Pudalov, Vladimir M.; Roditchev, D.; Stolyarov, V. S.; Vyalikh, Denis V.; Borisov, V.; Valenti, R.; Ernst, Arthur; Eremeev, Sergey V.; Chulkov, Evgueni V. (American Physical Society, 2021-05-25)
      In the novel stoichiometric iron-based material RbEuFe4As4, superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states. Using angle-resolved photoemission spectroscopy, we reveal a complex ...
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      Emerging 2D-ferromagnetism and strong spin-orbit coupling at the surface of valence-fluctuating EuIr2Si2 

      Schulz, Susanne; Nechaev, Ilya A.; Guettler, Monika; Poelchen, Georg; Generalov, Alexander; Danzenbaecher, Steffen; Chikina, Alla; Seiro, Silvia; Kliemt, Kristin; Vyazovskaya, Alexandra Yu; Kim, Timur K.; Dudin, Pavel; Chulkov, Evgueni V.; Laubschat, Clemens; Krasovskii, Eugene E.; Geibel, Christoph; Krellner, Cornelius; Kummer, Kurt; Vyalikh, Denis V. (Nature Publishing Group, 2019-06-03)
      The development of materials that are non-magnetic in the bulk but exhibit two-dimensional (2D) magnetism at the surface is at the core of spintronics applications. Here, we present the valence-fluctuating material EuIr2Si2, ...