Disorder in two-dimensional Josephson junctions
Baruch Horovitz, Anatoly Golub
DOI 10.1103/PhysRevB.55.14499 · Physical Review B
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Abstract
An effective free energy of a two-dimensional (i.e., large area) Josephson junction is derived, allowing for thermal fluctuations, random magnetic fields, and external currents. We show by using replica-symmetry-breaking methods that the junction has four distinct phases: disordered, Josephson ordered, a glass phase, and a coexisting Josephson order with the glass phase. Near the coexistence to glass transition at s= the critical current is ∼( area)−s+1/2 where s is a measure of disorder. Our results may account for junction ordering at temperatures well below the critical temperature of the bulk in high-Tc trilayer junctions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | onset |
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