Anomalous Josephson effect between even- and odd-frequency superconductors.
We demonstrate that, contrary to standard wisdom, the lowest-order Josephson coupling is possible between odd- and even-frequency superconductors. The origin of this effect is the induced odd- (even-)frequency pairing component at the interface of bulk even- (odd-)frequency superconductors. The resulting current-phase relation is found to be proportional to cosphi, where phi is the macroscopic phase difference between the two superconductors.
Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan.
Yukio
Y
Tanaka
Alexander A
AA
Golubov
Satoshi
S
Kashiwaya
Masahito
M
Ueda