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TT: Fachverband Tiefe Temperaturen
TT 76: Superconductivity: Tunnelling and Josephson Junctions II
TT 76.4: Talk
Thursday, March 21, 2024, 15:45–16:00, H 3010
Equal contribution of even and odd frequency pairing for normal metal metal/superconductor junctions — •Shun Tamura1, Viktoriia Kornich1, and Björn Trauzettel1,2 — 1Institute for Theoretical Physics and Astrophysics, University of Würzburg, Würzburg, Germany — 2Würzburg-Dresden Cluster of Excellence ct.qmat, Würzburg, Germany
Odd-frequency pairings are odd under the exchange of the relative time or frequency of the superconducting pairing. Odd-frequency pairing emerges specifically at the surface or interface of superconductors. We calculate the conductance of normal metal/superconductor junctions based on the linear response theorem. We observe that the contributions to the conductance from odd and even frequency pairings are equal, even though the superconductor follows a conventional s-wave spin-singlet pairing.
Keywords: odd-frequency pairing; Andreev reflection; conductance; linear response theory; normal metal-superconductor junction