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arXiv · 0712.0134

Identifying the odd-frequency superconducting state by a field-induced Josephson effect

Jacob Linder·Takehito Yokoyama·Asle Sudbø
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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 {\it 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.

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Jacob Linder, Takehito Yokoyama, Asle Sudbø. 2008-04-14. Identifying the odd-frequency superconducting state by a field-induced Josephson effect. https://doi.org/10.1103/physrevb.77.174507

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