Quantum Einstein-de Haas effect

Marc Ganzhorn, Svetlana Klyatskaya, Mario Ruben and Wolfgang Wernsdorfer ()
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Marc Ganzhorn: Institut Néel, CNRS & Université Joseph Fourier
Svetlana Klyatskaya: Institut of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
Mario Ruben: Institut of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
Wolfgang Wernsdorfer: Institut Néel, CNRS & Université Joseph Fourier

Nature Communications, 2016, vol. 7, issue 1, 1-5

Abstract: Abstract The classical Einstein-de Haas experiment demonstrates that a change of magnetization in a macroscopic magnetic object results in a mechanical rotation of this magnet. This experiment can therefore be considered as a macroscopic manifestation of the conservation of total angular momentum and energy of electronic spins. Since the conservation of angular momentum is a consequence of a system’s rotational invariance, it is valid for an ensemble of spins in a macroscopic ferromaget as well as for single spins. Here we propose an experimental realization of an Einstein-de Haas experiment at the single-spin level based on a single-molecule magnet coupled to a nanomechanical resonator. We demonstrate that the spin associated with the single-molecule magnet is then subject to conservation of total angular momentum and energy, which results in a total suppression of the molecule’s quantum tunnelling of magnetization.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11443

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DOI: 10.1038/ncomms11443

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