Analytical Result on Electronic States around a Vortex Core in a Noncentrosymmetric Superconductor
Yuki Nagai, Yusuke Kato, Nobuhiko Hayashi
Abstract
We analytically study electronic bound states around a single vortex core in a noncentrosymmetric superconductor such as CePt3Si without mirror symmetry about the ab plane. Considering a mixed spin-singlet-triplet Cooper pairing model, we obtain a formula about the local density of states (LDOS) around a vortex core in any directions of magnetic fields. The LDOS under a magnetic field perpendicular to the c axis are quite different from those of typical s-wave or d-wave superconductors. From the ellipticity of the spatial pattern of the LDOS around a vortex core, one can estimate experimentally the pairing symmetry of CePt3Si such as the position of the gap nodes and the ratio of the singlet component to the triplet component in order parameter.
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