Journal
EUROPEAN PHYSICAL JOURNAL B
Volume 94, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1140/epjb/s10051-021-00073-3
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Funding
- Deutsche Forschungsgemeinschaft [DFG 355031190, FOR 2692, 397300368 (SCHN 615/25-1)]
- Projekt DEAL
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The study reveals that certain spin-phonon Hamiltonians exhibit unexpected robustness against the suppression of magnetization tunneling, even for strong spin-phonon coupling.
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.
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