Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 6: Superconductivity: Properties and Electronic Structure
TT 6.2: Vortrag
Montag, 7. März 2016, 10:15–10:30, H19
Vortex-bound zero-energy modes in the noncentrosymmetric superconductors — •Oleksiy Kashuba1 and Carsten Timm2 — 1Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Deutschland — 2Institut für Theoretische Physik, TU Dresden, 01062 Dresden, Deutschland
Nodal noncentrosymmetric superconductors are known to be the candidate for the realization of the surface-bound zero-energy modes. We investigate whether the similar modes bound to the 1D defects may exist in the superconductors with unconventional pairing. The known example of such modes are the Majorana states in the half-integer vortices in the px+ipy-wave superconductor. We showed that there is a precise mapping of the localized cylindrical solutions in the superconductor with arbitrary pairing onto the localized solutions in the superconducting Anderson chain model. We studied different superconductor pairing which depends on the crystal symmetry and found out that in some systems, like ones with cubic symmetry (Li2PdxPt3−x, Mo3Al2C), such states are forbidden, and for other, like ones with tetrahedral symmetry (Y2C3), the zero-energy states may exist.