Shenoy, Subodh R. (1988) Glassy relaxation in hierarchically frustrated Josephson arrays Physica B: Condensed Matter, 152 (1-2). pp. 72-84. ISSN 0921-4526
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0921-4526(88)90071-3
Abstract
Josephson arrays with hierarchical patterns of frustration may provide a physical prototype for glasses. Flux/disorder patterns {fI} with fI=±f, ∑IfI=0 that have a self-similar character on coarse-graining, can be con structed iteratively, composed of quasi-neutral clusters. A nonequilibrium population of topological excitations {mI=±1}, ∑ImI=0, trapped on such a hierarchical background, should annihilate sequentially ~t−T/Ta due to the hierarchy of time scales. (Here T/Ta is a scaled temperature.) Arrays with a hierarchical pattern of flux penetration areas/intergrain couplings could show glassy behaviour, on rapid cooling or rapid reduction of magnetic fields H. This might be relevant for understanding magnetic moment relaxation M(t)~-H3Tln t seen in high-Tc glassy superconductors.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
ID Code: | 46040 |
Deposited On: | 30 Jun 2011 09:57 |
Last Modified: | 30 Jun 2011 09:57 |
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