Model for vortex-core tunneling spectroscopy of chiral p-wave superconductors via odd-frequency pairing states.
The local density of states is studied theoretically in terms of the odd-frequency (odd-omega) Cooper pairing induced around a vortex core. We find that a zero energy peak in the density of states at the vortex center is robust against nonmagnetic impurities in a chiral p-wave superconductor owing to an odd-omega s-wave pair amplitude. We suggest how to discriminate a spin-triplet pairing symmetry and spatial chiral-domain structure by scanning tunneling spectroscopy via odd-omega pair amplitudes inside vortex cores.
Tanuma
Yasunari
Y
Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan.
Hayashi
Nobuhiko
N
Tanaka
Yukio
Y
Golubov
Alexander A
AA