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Title: Fully frustrated XY model with next-nearest-neighbor interaction
Author: Franzese, Giancarlo
Cataudella, Vittorio
Korshunov, S. E.
Fazio, R.
Keywords: Superconductivitat
Propietats magnètiques
Regla de les fases i equilibri
Magnetic properties
Phase rule and equilibrium
Issue Date: 2000
Publisher: The American Physical Society
Abstract: We investigate a fully frustrated XY model with nearest-neighbor ~NN! and next-nearest-neighbor ~NNN! couplings which can be realized in Josephson junction arrays. We study the phase diagram for 0<x<1 (x is the ratio between NNN and NN couplings!. When x,1/A2 an Ising transition and a Berezinskii-KosterlitzThouless transition are present. Both critical temperatures decrease with increasing x. For x.1/A2 the array undergoes a sequence of two transitions. On raising the temperature first the two sublattices decouple from each other and then, at higher temperatures, each sublattice becomes disordered. The structure of phase diagram remains the same if weak interaction with further neighbors is included.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2000, vol. 62, núm. 14, p. R9287-R9290
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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