Orbital angular momentum in a nonchiral topological superconductor
Atsuo Shitade, Yuki Nagai
DOI 10.1103/PhysRevB.92.024502 · Physical Review B
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Abstract
We investigate the bulk orbital angular momentum in a two-dimensional time-reversal broken topological superconductor with the Rashba spin-orbit interaction, the Zeeman interaction, and the s-wave pairing potential. Prior to the topological phase transition, we find the crossover from s wave to p wave. For the large spin-orbit interaction, even in the topological phase, Lz/N does not reach −1/2, which is the intrinsic value in chiral p-wave superconductors. Here Lz and N are the bulk orbital angular momentum and the total number of electrons at zero temperature, respectively. Finally, we discuss the effects of nonmagnetic impurities.
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