Finite Density of States in a Mixed State of d_x^2-y^2+id_xy Superconductor

Details Finite Density of States in a Mixed State of d_x^2-y^2+id_xy Superconductor Finite Density of States in a Mixed State of d_x^2-y^2+id_xy Superconductor

1998-09-04

arxiv.org/abs/cond-mat/9809095v4

Phys. Rev. B 59, 6024, (1999)

Physics

Condensed Matter

Superconductivity

This is an appended version of the paper published in Phys. Rev. {\bf B 59}, 6024, (1999). We now also discuss the disorder ef

Scientific paper

10.1103/PhysRevB.59.6024

We have calculated the density of states of quasiparticles in a d_x^2-y^2+id_xy superconductor, and show that in the mixed state the quasiparticle spectrum remains gapless because of the Doppler shift by superflow. It was found that if the d_{xy} order gap $\Delta_1\propto \sqrt{H}$ as suggested by experiments, then thermal conductivity $\kappa \propto \sqrt{H}$ in accord with experimental data at lowest temperatures. This is an appended version of the paper published in Phys. Rev. {\bf B 59}, 6024, (1999). We now also discuss the disorder effects and analyze the H log H crossover at small fields. We argue that H log H regime is present and disorder effect is dominant as the field-induced seconary gap is small at small fields.

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