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Cooper Pair Shape in Normal-metal/Superconductor Junctions
Y. Tanaka, Y. Asano, A. A. Golubov
In s-wave superconductors the Cooper pair wave function is isotropic in momentum space. This property may also be expected for Cooper pairs entering a normal metal from a supercond…
Properties of tunnel Josephson junctions with a ferromagnetic interlayer
A. S. Vasenko, A. A. Golubov, M. Yu. Kupriyanov +1
We investigate superconductor/insulator/ferromagnet/superconductor (SIFS) tunnel Josephson junctions in the dirty limit, using the quasiclassical theory. We formulate a quantitativ…
Decoherence in a superconducting flux qubit with a pi-junction
T. Kato, A. A. Golubov, Y. Nakamura
We consider the use of a pi-junction for flux qubits to realize degenerate quantum levels without external magnetic field. On the basis of the Caldeira-Leggett model, we derive an…
Odd-frequency Pairs and Josephson Current through a Strong Ferromagnet
Yasuhiro Asano, Yuki Sawa, Yukio Tanaka +1
We study Josephson current in superconductor / diffusive ferromagnet /superconductor junctions by using the recursive Green function method. When the exchange potential in a ferrom…
Odd-frequency pairing in normal metal/superconductor junctions
Y. Tanaka, Y. Tanuma, A. A. Golubov
We study the induced odd-frequency pairing states in ballistic normal metal/superconductor (N/S) junctions where a superconductor has even-frequency symmetry in the bulk and a norm…