A reformulation of tight-binding models that shifts orbital symmetry into Bloch phase factors is applied to predict coexisting s± and s_z2 pairing in Lu2Fe3Si5, but the framework reduces to standard tight-binding and leaves Wannier obstructions unresolved.
Oddershede, Polarization propagator calculations (Academic Press, 1978) pp
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Phase-Space Approach to Wannier Pairing and Bogoliubov Orbitals in Square-Octagon Lattices
A reformulation of tight-binding models that shifts orbital symmetry into Bloch phase factors is applied to predict coexisting s± and s_z2 pairing in Lu2Fe3Si5, but the framework reduces to standard tight-binding and leaves Wannier obstructions unresolved.