Yuki Nagai, Hiroki Nakamura, Masahiko Machida
We analytically and numerically reveal that Majorana bound states inside the vortex core are distinctly spin-polarized in an odd-parity topological superconductivity classified as "pseudo-scalar" type of the gap function in massively Dirac-Bogoliubov-de Gennes (BdG) Hamiltonian constrained by strong spin-orbit coupling. This result is universal for "Dirac superconductivity" whose rotational degree of freedom is characterized by total angular momentum $J = S + L$ and in marked contrast to spin-degenerate core bound states given by the conventional BdG Hamiltonian. The spin-polarized vortex core can be easily detected by spin-sensitive probes such as neutron scattering and other measurements well above the first critical magnetic field $H_{c1}$.
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http://arxiv.org/abs/1211.0125
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