Physics – Condensed Matter – Superconductivity
Scientific paper
2001-06-08
Phys. Rev. Lett. 88, 167007 (2002)
Physics
Condensed Matter
Superconductivity
4 pages, ReVTeX, the final version
Scientific paper
10.1103/PhysRevLett.88.167007
The unbinding of kink pairs on domain walls in the fully frustrated XY model (on square or triangular lattices) is shown to induce the vanishing of phase coupling across the walls. This forces the phase transition, associated with unbinding of vortex pairs to take place at a lower temperature than the other phase transition, associated with proliferation of the Ising-type domain walls. The results are applicable for a description of superconducting junction arrays and wire networks in perpendicular magnetic field (corresponding to half-integer number of flux quanta per each lattice plaquette), as well as of planar antiferromagnets with a triangular lattice.
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