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Edge effects in a frustrated Josephson junction array with modulated couplings | E. Granato
; J.M. Kosterlitz
; M.V. Simkin
; | Date: |
22 Oct 1997 | Journal: | Phys. Rev. B57, 3602 (1998) | Subject: | Superconductivity | cond-mat.supr-con | Abstract: | A square array of Josephson junctions with modulated strength in a magnetic field with half a flux quantum per plaquette is studied by analytic arguments and dynamical simulations. The modulation is such that alternate columns of junctions are of different strength to the rest. Previous work has shown that this system undergoes an XY followed by an Ising-like vortex lattice disordering transition at a lower temperature. We argue that resistance measurements are a possible probe of the vortex lattice disordering transition as the linear resistance $R_{L}(T)sim A(T)/L$ with $ A(T) propto (T-T_{cI})$ at intermediate temperatures $T_{cXY}>T>T_{cI}$ due to dissipation at the array edges for a particular geometry and vanishes for other geometries. Extensive dynamical simulations are performed which support the qualitative physical arguments. | Source: | arXiv, cond-mat/9710242 | Services: | Forum | Review | PDF | Favorites |
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