Abstract.
The real part of the time-dependent ac susceptibility of the short-range Ising spin glass in a transverse field has been investigated at very low temperatures. We have used the quantum linear response theory and domain coarsening ideas of quantum droplet scaling theory. It is found that after a temperature quench to a temperature T 1 (lower than the spin glass transition temperature T g ) the ac susceptibility decreases with time approximately in a logarithmic way as the system tends to the equilibrium. It is shown that the transverse field of “tunneling” has unessential effect on the nonequilibrium dynamical properties of the magnetic droplet system. The role of quantum fluctuations in the behavior of the ac susceptibility is discussed.
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Received: 26 February 2004, Published online: 18 June 2004
PACS:
75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) - 75.10.Nr Spin-glass and other random models - 75.50.Lk Spin glasses and other random magnets
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Busiello, G., Saburova, R.V. & Sushkova, V.G. Low temperature nonequilibrium dynamics in transverse Ising spin glass. Eur. Phys. J. B 39, 69–76 (2004). https://doi.org/10.1140/epjb/e2004-00172-3
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DOI: https://doi.org/10.1140/epjb/e2004-00172-3