Artigo
Phase transition from a d(x(2)-y(2)) to d(x(2)-y(2))+id(xy) superconductor
Registro en:
Physica C: Superconductivity and its Applications, v. 309, n. 3-4, p. 251-256, 1998.
0921-4534
10.1016/S0921-4534(98)00585-1
WOS:000077710600013
2-s2.0-0032299513
Autor
Ghosh, Angsula [UNESP]
Adhikari, Sadhan K. [UNESP]
Resumen
The temperature dependencies of specific heat and spin susceptibility of a coupled dx2-y2 + idxy superconductor in the presence of a weak dxy component are investigated in the tight-binding model (1) on square lattice and (2) on a lattice with orthorhombic distortion. As the temperature is lowered past the critical temperature Tc, first a less ordered dx2-y2 superconductor is created, which changes to a more ordered dx2-y2 + idxy superconductor at Tcl(< Tc). This manifests in two second order phase transitions identified by two jumps in specific heat at Tc and Tc1. The temperature dependencies of the superconducting observables exhibit a change from power-law to exponential behavior as temperature is lowered below Tc1 and confirm the new phase transition. © 1998 Published by Elsevier Science B.V. All rights reserved. Inst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01.405-900 Sao Paula, Sao Paulo Inst. de Fis. Teórica Universidade Estadual Paulista, Rua Pamplona 145, 01.405-900 Sao Paula, Sao Paulo