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Supersymmetric spin–phonon coupling prevents odd integer spins from quantum tunneling

Author

Listed:
  • Kilian Irländer

    (Fakultät für Physik, Universität Bielefeld)

  • Heinz-Jürgen Schmidt

    (Fachbereich Physik, Universität Osnabrück)

  • Jürgen Schnack

    (Fakultät für Physik, Universität Bielefeld)

Abstract

Quantum tunneling of the magnetization is a phenomenon that impedes the use of small anisotropic spin systems for storage purposes even at the lowest temperatures. Phonons, usually considered for temperature dependent relaxation of magnetization over the anisotropy barrier, also contribute to magnetization tunneling for integer spin quantum numbers. Here we demonstrate that certain spin–phonon Hamiltonians are unexpectedly robust against the opening of a tunneling gap, even for strong spin–phonon coupling. The key to understanding this phenomenon is provided by an underlying supersymmetry that involves both spin and phonon degrees of freedom.

Suggested Citation

  • Kilian Irländer & Heinz-Jürgen Schmidt & Jürgen Schnack, 2021. "Supersymmetric spin–phonon coupling prevents odd integer spins from quantum tunneling," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 94(3), pages 1-10, March.
    • Handle: RePEc:spr:eurphb:v:94:y:2021:i:3:d:10.1140_epjb_s10051-021-00073-3
    DOI: 10.1140/epjb/s10051-021-00073-3
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    Cited by:

    1. Andrea Mattioni & Jakob K. Staab & William J. A. Blackmore & Daniel Reta & Jake Iles-Smith & Ahsan Nazir & Nicholas F. Chilton, 2024. "Vibronic effects on the quantum tunnelling of magnetisation in Kramers single-molecule magnets," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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