Ij. Hwang et D. Stroud, FIRST-ORDER FLUX-LATTICE MELTING OF A FRUSTRATED XY MODEL WITH A [111] MAGNETIC-FIELD, Physical review. B, Condensed matter, 54(21), 1996, pp. 14978-14981
We have studied a three-dimensional isotropic Josephson-junction array
in a simple cubic lattice with a magnetic field B = Phi(0)(1/3,1/3,1/
3), using Monte Carlo simulation. There is a clear first-order phase t
ransition with a latent heat of melting of about 0.11k(B)T(m) per supe
rconducting grain at a melting temperature T-m approximate to 0.70J, w
here J is the intergrain coupling energy. We briefly discuss the possi
ble relation of this transition to flux-lattice melting in high-T-c su
perconductors.