## Field-angle Resolved Flux-flow Resistivity as a Phase-sensitive Probe of Unconventional Cooper Pairing    [PDF]

Yoichi Higashi, Yuki Nagai, Masahiko Machida, Nobuhiko Hayashi
We theoretically investigate the applied magnetic field-angle dependence of the flux-flow resistivity $\rho_{\rm f}(\alpha_{\rm M})$ for an uniaxially anisotropic Fermi surface. $\rho_{\rm f}$ is related to the quasiparticle scattering rate $\varGamma$ inside a vortex core, which reflects the sign change in the superconducting pair potential. We find that $\rho_{\rm f}(\alpha_{\rm M})$ is sensitive to the sign-change in the pair potential and has its maximum when the magnetic field is parallel to the gap-node direction. We propose the measurement of the field-angle dependent oscillation of $\rho_{\rm f}(\alpha_{\rm M})$ as a phase-sensitive field-angle resolved experiment.
View original: http://arxiv.org/abs/1304.6509