Abstract
The disordered and frustrated XY-model is investigated to model weakly coupled superconducting grains in a magnetic field. We discuss its glassy features and relate them to high-T c superconductors. Monte-Carlo results are also presented, providing hints on the type of relaxational behavior of the magnetization and the magnetic memory effect known from spin glasses.
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This formula can be derived from the supercurrents circulating in a network of Josephson junctions which is a physical realization of a frustrated XY-model.
M. Vanhimbeeck, R. Hetzel, unpublished work.
I. Morgenstern, (Spin) Glass Behavior in High-T, Superconductors, in: Proc. of the 16th Course “Earlier and Recent Aspects of Superconductivity” of the Int. School of Materials Science and Technology, Erice, July 4–16, 1989 (Springer-Verlag).
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Hetzel, R., Morgenstern, I. (1990). Numerical Simulation of the Magnetic Relaxation in Superconducting Systems. In: Campbell, I.A., Giovannella, C. (eds) Relaxation in Complex Systems and Related Topics. NATO ASI Series, vol 222. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2136-9_18
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DOI: https://doi.org/10.1007/978-1-4899-2136-9_18
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