Anisotropic electron-phonon coupling plus screened Coulomb repulsion on Weyl-semimetal Fermi arcs yields the observed nodal i-wave superconducting gap when the surface bandwidth matches the phonon energy scale.
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Spin-ARPES on PtBi2 shows spin-polarized singly degenerate Fermi-arc surface states with termination-dependent dispersion, supporting its candidacy for topological superconductivity.
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Mechanism for Nodal Topological Superconductivity on PtBi$_2$ Surface
Anisotropic electron-phonon coupling plus screened Coulomb repulsion on Weyl-semimetal Fermi arcs yields the observed nodal i-wave superconducting gap when the surface bandwidth matches the phonon energy scale.
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Fermiology and spin polarization of topological surface states in PtBi$_2$
Spin-ARPES on PtBi2 shows spin-polarized singly degenerate Fermi-arc surface states with termination-dependent dispersion, supporting its candidacy for topological superconductivity.