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Stability against contact interactions of a topological superconductor in two-dimensional space protected by time-reversal and reflection symmetries
A two-dimensional topological superconductor with strong spin-orbit coupling supports an arbitrary integer number ($\ensuremath{\nu}$) of pairs of gapless helical edge states along its boundary that are protected by the combined effects of time-reversal symmetry and reflection symmetry in the mean-field approximation. Here, the authors show that when the number $\ensuremath{\nu}$ …