Effect of uniaxially anisotropic Fermi surface on the quasiparticle scattering inside a vortex core in unconventional superconductors

Abstract

We theoretically study the dependence of the quasiparticle (QP) scattering rate $\Gamma$ on the uniaxial anisotropy of a Fermi surface with changing the magnetic field angle ${\alpha }_{\mathrm{M}}$. We consider the QP scattering due to the non-magnetic impurities inside a single vortex core. The field-angle dependence of the quasiparticle scattering rate $\Gamma ({\alpha }_{\mathrm{M}})$ is sensitive to the sign-change of the pair potential. We show that with increasing the two dimensionality of the system, $\Gamma ({\alpha }_{\mathrm{M}})$ reflects more clearly whether there is the sign-change in the pair potential.

5 pages, 7 figures; Proc. of ISS2011

References in corpus (5)

• Nodal Structure of Unconventional Superconductors Probed by the Angle Resolved Thermal Transport Measurements
• Analytical Formulation of the Local Density of States around a Vortex Core in Unconventional Superconductors
• Influence of Fermi surface topology on the quasiparticle spectrum in the vortex state
• Kramer-Pesch approximation for analyzing field-angle-resolved measurements made in unconventional superconductors: A calculation of the zero-energy density of states
• Field-angle dependence of the quasiparticle scattering inside a vortex core in unconventional superconductors