A. Kumagai et H. Ebisawa, DYNAMICAL INDUCTION OF S-WAVE COMPONENT IN D-WAVE SUPERCONDUCTOR DRIVEN BY THERMAL FLUCTUATIONS, Journal of the Physical Society of Japan, 67(10), 1998, pp. 3585-3589
We investigated the mutual induction effects between the d-wave and th
e s-wave components of order parameters due to superconducting fluctua
tion above the critical temperatures and calculated its contributions
to paraconductivity and excess Hall conductivity based on the two-comp
onent stochastic TDGL equation. It is shown that the coupling of two c
omponents increases paraconductivity while it decreases excess Hall co
nductivity compared to the cases when each component fluctuates indepe
ndently. We also found the singular behavior in the paraconductivity a
nd the excess Hall conductivity dependence on the coupling parameter w
hich is consistent with the natural restriction among the coefficients
of gradient terms.