Field-angle dependence of the quasiparticle scattering inside a vortex core in unconventional superconductors

Abstract

We theoretically investigate the quasiparticle scattering rate $\Gamma$ inside a vortex core in the existence of non-magnetic impurities distributed randomly in a superconductor. We show that the dependence of $\Gamma$ on the magnetic field direction is sensitive to the sign of the pair potential. The behavior of $\Gamma$ is quite different between an s-wave and a d-wave pair potential, where these are assumed to have the same amplitude anisotropy, but a sign change only for the d-wave one. It is suggested that measurements of the microwave surface impedance with changing applied-field directions would be used for the phase-sensitive identification of pairing symmetry.

5 pages, 6 figures; Proc. of ISS2010

References in corpus (3)

• Analytical Formulation of the Local Density of States around a Vortex Core in Unconventional Superconductors
• Positions of Point-Nodes in Borocarbide Superconductor YNi2B2C
• Kramer-Pesch approximation for analyzing field-angle-resolved measurements made in unconventional superconductors: A calculation of the zero-energy density of states

Cited by in corpus (1)

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