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  • Letter

Coexistence of antiferromagnetism and superconductivity in Mn/Nb(110)

Roberto Lo Conte1,*, Maciej Bazarnik1,2,†, Krisztián Palotás3,4,5, Levente Rózsa6, László Szunyogh4,7, André Kubetzka1, Kirsten von Bergmann1, and Roland Wiesendanger1

  • 1Department of Physics, University of Hamburg, D-20355 Hamburg, Germany
  • 2Institute of Physics, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland
  • 3Institute for Solid State Physics and Optics, Wigner Research Center for Physics, H-1525 Budapest, Hungary
  • 4Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary
  • 5MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, H-6720 Szeged, Hungary
  • 6Department of Physics, University of Konstanz, D-78457 Konstanz, Germany
  • 7MTA-BME Condensed Matter Research Group, Budapest University of Technology and Economics, H-1111 Budapest, Hungary

  • *rloconte.magnetism@gmail.com
  • †mbazarni@physnet.uni-hamburg.de
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Phys. Rev. B 105, L100406 – Published 10 March, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L100406

Abstract

We report on the structural, magnetic, and superconducting properties of single and double atomic layers of Mn on a clean and unreconstructed Nb(110) substrate. Low-temperature scanning tunneling spectroscopy measurements reveal a proximity-induced superconducting state and in-gap Yu-Shiba-Rusinov bands in the Mn thin films, which are found to grow pseudomorphically on the Nb surface. Spin-polarized scanning tunneling microscopy measurements reveal a c(2×2) antiferromagnetic (AFM) order in the Mn layers, with an out-of-plane spin orientation. First-principles density functional theory calculations confirm the experimentally observed magnetic state, which is understood as the consequence of a strong intralayer and interlayer nearest-neighbor AFM exchange coupling. These results are expected to be of importance for the design of superconducting AFM spintronic systems and quantum information technologies.

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Phys. Rev. B 105, L100406– Published 10 March, 2022
  • Received 18 August 2021
  • Revised 20 February 2022
  • Accepted 23 February 2022
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