Faculty Profiles - TANAKA, Yukio

Papers - TANAKA, Yukio

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*Theory of the proximity effect in junctions with unconventional superconductors Invited Reviewed

Y. Tanaka and A. A. Golubov

Physical Review Letters Vol. 98 ( 3 ) page： 037003_1-4 2007

Language：English Publishing type：Research paper (scientific journal)

We present a general theory of the proximity effect in junctions between diffusive normal metals (DN)
and superconductors. Various possible symmetry classes in a superconductor are considered: evenfrequency
spin-singlet even-parity (ESE) state, even-frequency spin-triplet odd-parity state, oddfrequency
spin-triplet even-parity (OTE) state and odd-frequency spin-singlet odd-parity state. It is shown
that the pair amplitude in a DN belongs, respectively, to an ESE, OTE, OTE, and ESE pairing state since
only the even-parity s-wave pairing is possible due to the impurity scattering.

Theory of Josephson effect in Sr2RuO4 / diffusive ferromagnet / Sr2RuO4 junctions Reviewed

Y. Sawa, T. Yokoyama, Y. Tanaka, A. A. Golubov

Journal of Low Temperature Physics Vol. 148 ( 5-6 ) page： 887-891 2007

Dependence of Josephson Current on Orientational Angle in Diffusive p -Wave Superconductor Junctions Reviewed

Y. Sawa, T. Yokoyama, Y. Tanaka, A. A. Golubov.

Journal of Low Temperature Physics Vol. 148 ( 5-6 ) page： 881-886 2007

Conductance spectroscopy of spin-triplet superconductors Reviewed

Y. Asano, Y. Tanaka, A. Golubov and S. Kashiwaya.

Physical Review Letters Vol. 99 ( 6 ) page： 067005_1-4 2007

Enhanced triplet superconductivity in noncentrosymmetric systems, Reviewed

T. Yokoyama, S. Onari and Y. Tanaka.

Physical Review B Vol. 75 ( 17 ) page： 172511_1-4 2007

Local density of states at zigzag edges of carbon nanotubes and graphene Reviewed

K. Sasaki, K. Sato, E. Saito, J. Jiang, S. Onari and Y.Tanaka.

Physical Review B Vol. 75 ( 23 ) page： 235430_1-7 2007

Andreev bound states and tunneling characteristics of a non-centrosymmetric superconductor Reviewed

C. Iniotakis, N. Hayashi, T. Sawa, T. Yokoyama, U. May, Y. Tanaka and M. Sigrist.

Physical Review B Vol. 76 ( 1 ) page： 012501_1-4 2007

Anomalous Josephson effect between even- and odd-frequency superconductors Reviewed

Y. Tanaka, A. Golubov, S. Kashiwaya and M. Ueda

Physical Review Letters Vol. 99 page： 037005_1-4 2007

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

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 cos\phi, where \phi is the macroscopic phase difference between the two superconductors.

Theory of tunneling spectroscopy of ferromagnetic superconductors Reviewed

T. Yokoyama and Y. Tanaka

Physical Review B Vol. 75 ( 13 ) page： 132503_1-4 2007

Quasiclassical green's function theory of Josephson effect in chiral p-wave superconductor / diffusive normal metal / chiral p-wave superconductor junctions Reviewed

Y. Sawa, T. Yokoyama, Y. Tanaka and A. A. Golubov

Physical Review B Vol. 75 ( 13 ) page： 134508_1-9 2007

Angular dependence of Josephson currents in unconventional superconducting junctions Reviewed

T. Yokoyama, Y. Tanaka and A. A. Golubov.

Physical Review B, (Rapid Communications) Vol. 75 ( 2 ) page： 020502_1-4 2007

Theory of Superconductivity of Carbon Nanotubes and Graphene Reviewed

K. Sasaki, J. Jiang, R. Saito, S. Onari and Y. Tanaka

Journal of the Physical Society of Japan Vol. 76 ( 3 ) page： 033702_1-4 2007

Manifestation of the odd-frequency spin-triplet pairing state in diffusive ferromagnet / superconductor junctions Reviewed

T. Yokoyama, Y. Tanaka and A. A. Golubov.

Physical Review B Vol. 75 ( 13 ) page： 134510_1-8 2007

A unified origin for the 3D magnetism and superconductivity in NaxCoO2 Reviewed

K. Kuroki, S. Ohkubo, T. Nojima, R. Arita, S. Onari and Y. Tanaka.

Physical Review Letters Vol. 98 ( 13 ) page： 136401_1-4 2007

Theory of the Josephson effect in unconventional superconducting junctions with diffusive barriers Reviewed

T. Yokoyama, Y. Tanaka and A. A. Golubov

Physical Review B Vol. 75 ( 9 ) page： 094518_1-10 2007

Josephson effect due to odd-frequency pairs in diffusive half metals Reviewed

Y. Asano, Y. Tanaka and A. A. Golubov.

Physical Review Letters Vol. 98 ( 10 ) page： 107002_1-4 2007

Theory of tunneling spectroscopy in the Larkin-Ovchinnikov state Invited Reviewed

Y. Tanaka, Y. Asano, M. Ichioka and S. Kashiwaya

Physical Review Letters Vol. 98 ( 7 ) page： 077001_1-4 2007

Quantitative model for IcR product in d-wave Josephson junctions Reviewed

T. Yokoyama, Y. Sawa, Y. Tanaka, A. A. Golubov, A. Maeda and A. Fujimaki.

Physical Review B Vol. 76 page： 052508_1-4 2007

Theory of Josephson effect in d-wave superconductor / diffusive ferromagnet / d-wave superconductor junctions Reviewed

T. Yokoyama, Y. Tanaka and A. A. Golubov.

Journal of Magnetism and Magnetic Materials Vol. 310 page： 498-500 2007

Odd-frequency pairs and Josephson current through a strong ferromagnet Reviewed

Y. Asano, Y. Sawa. Y. Tanaka and A. A. Golubov

Physical Review B Vol. 77 ( 22 ) page： 224525_1-11 2007

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Papers - TANAKA, Yukio