Spin-polarized Majorana Bound States inside a Vortex Core in Topological Superconductors
Abstract
We reveal that Majorana bound states inside the vortex core in an odd-parity topological superconductivity classified as "pseudo-scalar" type in the gap function are distinctly spin-polarized by solving the massive Dirac Bogoliubov-de Gennes (BdG) equation considering the spin-orbit coupling. This result is universal for "Dirac superconductivity" whose rotational degree of freedom is characterized by the total angular momentum J = S + L and in marked contrast to the spin-degeneracy of the core bound states as the consequence of the conventional BdG equation. The spin-polarized vortex core can be easily detected by spin-sensitive probes such as the neutron scattering and other measurements well above the first critical magnetic field H_{c1}.
- Publication:
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arXiv e-prints
- Pub Date:
- November 2012
- DOI:
- 10.48550/arXiv.1211.0125
- arXiv:
- arXiv:1211.0125
- Bibcode:
- 2012arXiv1211.0125N
- Keywords:
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- Condensed Matter - Superconductivity
- E-Print:
- 10 pages, 6 figures to be published in J. Phys. Soc. Jpn