Ground states of a frustrated kagomé array of Josephson junctions
Mohammad R. Kolahchi, Joseph P. Straley
DOI 10.1103/PhysRevB.66.144502 · Physical Review B
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Abstract
We study the ground state vortex lattices of a kagomé array of Josephson junctions in an external magnetic field. We give a simple model that accounts for the principal dependence of ground state energy on the density of vortices, and exhibit the exact ground state configurations for a sequence of special values. A Monte Carlo simulated annealing shows that there is very little further structure. For the special case f=AB/Φ0=1/2 it is known that there is an infinite degeneracy. We give a numerical technique for evaluating the zero temperature entropy.
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| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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