Phase transition in positionally disordered Josephson-junction arrays in a transverse magnetic field

Chakrabarti, Amitabha ; Dasgupta, Chandan (1988) Phase transition in positionally disordered Josephson-junction arrays in a transverse magnetic field Physical Review B, 37 (13). pp. 7557-7563. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v37/i13/p7557_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.37.7557

Abstract

The critical behavior of positionally disordered two-dimensional Josephson-junction arrays in a transverse magnetic field is studied by Monte Carlo simulations. We consider a model in which each superconducting element is randomly displaced from its ideal position on a square lattice by a small amount. The effective strength of the disorder is changed by varying the magnitude of the transverse magnetic field. We consider those values of the magnetic field for which the parameter <f> that measures the average flux through an elementary plaquette in units of the flux quantum is integral. For <f>=1 and <f>=3, we find Kosterlitz-Thouless-type phase transition from a normal to a superconducting phase. For <f>=5 and <f>=7, the results suggest a spin-glass-like freezing over the time scales of the simulations. We do not find any evidence for a low-temperature reentrant transition for any value of <f>.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:22841
Deposited On:25 Nov 2010 13:58
Last Modified:17 May 2016 06:48

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