Quasiparticle spectrum in the vortex state of d-wave superconductors

Abstract

Quasiparticle spectrum associated with the nodal structure in d-wave superconductors is of great interest. We study theoretically the quasi-particle spectrum in a planar magnetic field, where the effect of the magnetic field is treated in terms of the Doppler shift. We obtain the angular dependent specific heat in the presence of a planar magnetic field and impurities, both in the superclean limit (Gamma/Delta << H/H_{c2}<< 1) and in the clean limit (H/H_{c2} << Gamma/Delta <<1). Also a similar analysis is used for the thermal conductivity tensor within the a-b plane. In particular, in contrast to the earlier works, we find a fourfold symmetry term in κ_{\parallel} and κ_{\perp} \sim -H \sin(2θ) where kappa_{perp} are the diagonal- and the off-diagonal components of the thermal conductivity tensor and θis the angle between the heat current and the magnetic field.

RevTex, 5 pages, 5 postscript figures

References in corpus (4)

• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates?
• Superconducting Gap Structure of Spin-Triplet Superconductor Sr_2RuO_4 Studied by Thermal Conductivity
• Nonlinear response and scaling law in the vortex state of d-wave superconductors

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