A 3D array of coupled Rashba nanowires forms a helical second-order topological superconductor with gapless helical Z_{2q} parafermionic modes localized on hinges.
Cheng, Superconducting proximity effect on the edge of fractional topological insulators, Phys
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Nonsymmorphic 1D four-band models with Kramers degeneracy support Z2 and Z4 invariants computed via extended open-path winding numbers, realized in topolectric circuits whose impedance reproduces phase boundaries and zero-energy modes that remain pinned under minimal disorder.
citing papers explorer
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$\mathbb Z_{2q}$ parafermionic hinge states in a three-dimensional array of coupled nanowires
A 3D array of coupled Rashba nanowires forms a helical second-order topological superconductor with gapless helical Z_{2q} parafermionic modes localized on hinges.
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One-dimensional topology and topolectrics of nonsymmorphic Kramers degenerate systems
Nonsymmorphic 1D four-band models with Kramers degeneracy support Z2 and Z4 invariants computed via extended open-path winding numbers, realized in topolectric circuits whose impedance reproduces phase boundaries and zero-energy modes that remain pinned under minimal disorder.