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Nonlinear dynamics of semiclassical spin in a time-dependent magnetic field

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Abstract

The dynamics of magnetic nanoclusters (or molecules) with a large spin in a magnetic field whose strength varies in proportion to time is analyzed. Such a field breaks the symmetry relative to rotations through 2π, as well as clockwise and counterclockwise rotations, and induces a number of new coherent quantum effects in the spin dynamics, such as the formation of a band energy spectrum with continuous spin states or the emergence of “Bloch” oscillations in spin precession and interband Zener tunneling. Bloch oscillations are manifested in experiment as equidistant identical jumps on the magnetization curve. The interband Zener tunneling gives rise to additional jumps and peaks on the susceptibility of the system.

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Authors and Affiliations

  1. Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    A. K. Zvezdin

  2. Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    D. I. Plokhov

Authors
  1. A. K. Zvezdin
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  2. D. I. Plokhov
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__________

Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 124, No. 1, 2003, pp. 96–104.

Original Russian Text Copyright © 2003 by Zvezdin, Plokhov.

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Zvezdin, A.K., Plokhov, D.I. Nonlinear dynamics of semiclassical spin in a time-dependent magnetic field. J. Exp. Theor. Phys. 97, 85–92 (2003). https://doi.org/10.1134/1.1600800

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  • DOI: https://doi.org/10.1134/1.1600800

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