Positional disorder in a Josephson-junction array

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.1669· OSTI ID:7069357

Choi, M Y; Chung, J S; Stroud, D

The effects of positional disorder on the critical behavior of a two-dimensional Josephson-junction array in a magnetic field are investigated both analytically and numerically. The standard replica method is used to analyze this disordered system, which is a physical realization of the two-dimensional gauge glass. It is shown that in the fully frustrated case, weak positional disorder does not change the critical behavior of the pure system although the critical temperature is lowered. Numerical simulations show that the sharpness of the transition is indeed preserved under weak positional disorder. For sufficiently strong disorder, evidence of the transition disappears from the Monte Carlo simulations. Evidence for or against a reentrant transition at low temperature is inconclusive.

• Research Organization: Department of Physics, The Ohio State University, Columbus, Ohio 43210
• OSTI ID: 7069357
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FIELDS
MONTE CARLO METHOD
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
SIMULATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TWO-DIMENSIONAL CALCULATIONS