1304.2952 (Yoichi Higashi et al.)

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

Yoichi Higashi, Yuki Nagai, Masahiko Machida, Nobuhiko Hayashi

We theoretically study the dependence of the quasiparticle (QP) scattering rate $\varGamma$ on the uniaxial anisotropy of a Fermi surface with changing the magnetic field angle $\alpha_{\rm M}$. 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 $\varGamma(\alpha_{\rm M})$ is sensitive to the sign-change of the pair potential. We show that with increasing the two dimensionality of the system, $\varGamma(\alpha_{\rm M})$ reflects more clearly whether there is the sign-change in the pair potential.

View original: http://arxiv.org/abs/1304.2952