Identifying the odd-frequency pairing state of superconductors by a field-induced Josephson effect

Jacob Linder; Takehito Yokoyama; Asle Sudbø

doi:10.1103/PhysRevB.77.174507

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Identifying the odd-frequency pairing state of superconductors by a field-induced Josephson effect

Jacob Linder, Takehito Yokoyama, Asle Sudbø

DOI 10.1103/PhysRevB.77.174507 · Physical Review B

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Abstract

Superconducting order parameters that are odd under exchange of time coordinates of the electrons constituting a Cooper pair are potentially of great importance both conceptually and technologically. Recent experiments report that such an odd-frequency superconducting bulk state may be realized in certain heavy-fermion compounds. While the Josephson current normally only flows between superconductors with the same symmetries with respect to frequency, we demonstrate that an exchange field may induce a current between diffusive even- and odd-frequency superconductors. This suggests a way to identify the possible existence of bulk odd-frequency superconductors.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CeRhIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NaxCoO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown