Ghosh, A.Adhikari, S. K.2014-05-202014-05-201999-09-01Physica C. Amsterdam: Elsevier B.V., v. 322, n. 1-2, p. 37-44, 1999.0921-4534http://hdl.handle.net/11449/23465We study numerically the temperature dependencies of specific heat, susceptibility, penetration depth, and thermal conductivity of a coupled (d(x2-y2) + is)-wave Bardeen-Cooper-Schrieffer (BCS) superconductor in the presence of a weak s-wave component (1) on square lattice and (2) on a lattice with orthorhombic distortion. As the temperature is lowered past the critical temperature T-c, a less ordered superconducting phase is created in d(x2-y2) wave, which changes to a more ordered phase in (d(x2-y2) + is) wave at T-c1. This manifests in two second-order phase transitions. The two phase transitions are identified by two jumps in specific heat at T-c and T-c1. The temperature dependencies of the superconducting observables exhibit a change from power-law to exponential behavior as temperature is lowered below T-c1 and confirm the new phase transition. (C) 1999 Elsevier B.V. B.V. All rights reserved.37-44engd(x2-y2) + is-wave superconductorspecific heatsusceptibilitythermal conductivityArtigo10.1016/S0921-4534(99)00401-3WOS:000083004500006Acesso restrito8031087349809439