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Spin-triplet Superconductivity in Nonsymmorphic crystals

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arxiv 2208.09409 v1 pith:3HELOU2K submitted 2022-08-19 cond-mat.supr-con

Spin-triplet Superconductivity in Nonsymmorphic crystals

classification cond-mat.supr-con
keywords nonsymmorphicspin-tripletsuperconductivitycouplingpairingspin-orbitsymmetryassist
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Spin-triplet superconductivity is known to be a rare quantum phenomenon. Here we show that nonsymmorphic crystalline symmetries can dramatically assist spin-triplet superconductivity in the presence of spin-orbit coupling. Even with a weak spin-orbit coupling, the spin-triplet pairing can be the leading pairing instability in a lattice with a nonsymmorphic symmetry. The underlining mechanism is the spin-sublattice-momentum lock on electronic bands that are protected by the nonsymmorphic symmetry. We use the nonsymmorphic space group P4/nmm to demonstrate these results and discuss related experimental observables. Our work paves a new way in searching for spin-triplet superconductivity.

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  1. Discovery of a nonsymmorphic superconductor with spontaneous rotational symmetry breaking and nontrivial zero modes

    cond-mat.supr-con 2026-05 unverdicted novelty 5.0

    PtPb4 is identified as a nonsymmorphic superconductor with spontaneous rotational symmetry breaking and zero-energy vortex bound states consistent with Majorana modes.