A model of odd-frequency superconductors produces sharper optical-conductivity peaks and negative imaginary conductivity that BCS pairing does not, offering a proposed optical signature for the elusive Berezinskii phase.
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Spectroscopic and optical response of odd-frequency superconductors
A model of odd-frequency superconductors produces sharper optical-conductivity peaks and negative imaginary conductivity that BCS pairing does not, offering a proposed optical signature for the elusive Berezinskii phase.