Impurity effects in a vortex core in a chiral p-wave superconductor within the t-matrix approximation

Abstract

We study the effects of non-magnetic impurity scattering on the Andreev bound states (ABS) in an isolated vortex in a two-dimensional chiral p-wave superconductor numerically. We incorporate the impurity scattering effects into the quasiclassical Eilenberger formulation through the self-consistent $t$-matrix approximation. Within this scheme, we calculate the local density of states (LDOS) around two types of vortices: "parallel" ("anti-parallel") vortex where the phase winding of the pair-potential coming from vorticity and that coming from chirality have the same (opposite) sign. When the scattering phase-shift ${\delta }_0$ of each impurity is small, we find that impurities affect differently low energy quasiparticle spectrum around the two types of vortex in a way similar to that in the Born limit (${\delta }_0\to 0$). For a larger ${\delta }_0(\le \pi /2)$ however we find that ABS in the vortex is strongly suppressed by impurities for both types of vortex. We found that there are some correlations between the suppression of ABS near vortex cores and the low energy density of states due to impurity bands in the bulk.

7 pages, 4 figures

References in corpus (4)

• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Thermodynamic properties of thin films of superfluid 3He-A
• Model for Vortex-core tunneling spectroscopy of chiral p-wave superconductors via odd-frequency pairing states
• Chirality sensitive effect on surface states in chiral p-wave superconductors

Cited by in corpus (3)

• Impurity effects in a two-dimensional topological superconductor: A link of Tc-robustness with a topological number
• Effects of Weak and Strong Scatterers on the Spectra of Vortex Andreev Bound States in Two-Dimensional Chiral p-wave Superconductors
• Emergence of Non-Axisymmetric Vortex in Strong-Coupling Chiral p-Wave Superconductor