Euler-class superconductors with d-wave pairing exhibit a topological jump in the linear optical conductivity at 2Δ0, bounded by the total patch Euler class, plus a √(ω−2Δ0) third-order enhancement.
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Optical signatures of Euler superconductors
Euler-class superconductors with d-wave pairing exhibit a topological jump in the linear optical conductivity at 2Δ0, bounded by the total patch Euler class, plus a √(ω−2Δ0) third-order enhancement.