Unconventional superconductivity in f-electron systems

Y. Õnuki; R. Settai; T. Takeuchi; Y. Haga; E. Yamamoto; N. Tateiwa; M. Nakashima; H. Shishido; T. C. Kobayashi; D. Aoki

Unconventional superconductivity in f-electron systems

Y. Õnuki, R. Settai, T. Takeuchi, Y. Haga, E. Yamamoto, N. Tateiwa, M. Nakashima, H. Shishido, T. C. Kobayashi, D. Aoki

Materials Processing and Characterization Division

Research output: Contribution to journal › Article

Abstract

We report pressure-induced superconductivity in antiferromagnetic cerium compounds and a ferromagnetic uranium compound, focusing on the relation between the superconducting state and the Fermi surface instability in CeRhIn ₅ and the huge upper critical field H_c2 in CeIrSi ₃ without inversion symmetry in the crystal structure. The pairing interaction is well correlated with ferromagnetism, as well as antiferromagnetism or antiferromagnetic fluctuations. In the recently discovered superconductor NpPd₅Al₂, superconductivity is found to be located in the vicinity of an antiferromagnetically ordered state. The upper critical field H_c2 is strongly supressed by the large paramagneic effect, and the corresponding magnetization curve indicates a step-like increase at H_c2, producing a first-order phase transition.

Original language	English
Pages (from-to)	1034-1040
Number of pages	7
Journal	Journal of the Korean Physical Society
Volume	53
Issue number	2 PART 1
Publication status	Published - 2008 Aug 1

Keywords

CeIrSi
CeRhIn
UPdAl
Unconventional superconductivity
dHvA

ASJC Scopus subject areas

Physics and Astronomy(all)

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Õnuki, Y., Settai, R., Takeuchi, T., Haga, Y., Yamamoto, E., Tateiwa, N., Nakashima, M., Shishido, H., Kobayashi, T. C., & Aoki, D. (2008). Unconventional superconductivity in f-electron systems. Journal of the Korean Physical Society, 53(2 PART 1), 1034-1040.

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abstract = "We report pressure-induced superconductivity in antiferromagnetic cerium compounds and a ferromagnetic uranium compound, focusing on the relation between the superconducting state and the Fermi surface instability in CeRhIn 5 and the huge upper critical field Hc2 in CeIrSi 3 without inversion symmetry in the crystal structure. The pairing interaction is well correlated with ferromagnetism, as well as antiferromagnetism or antiferromagnetic fluctuations. In the recently discovered superconductor NpPd5Al2, superconductivity is found to be located in the vicinity of an antiferromagnetically ordered state. The upper critical field Hc2 is strongly supressed by the large paramagneic effect, and the corresponding magnetization curve indicates a step-like increase at Hc2, producing a first-order phase transition.",

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AU - Settai, R.

AU - Takeuchi, T.

AU - Haga, Y.

AU - Yamamoto, E.

AU - Tateiwa, N.

AU - Nakashima, M.

AU - Shishido, H.

AU - Kobayashi, T. C.

AU - Aoki, D.

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AB - We report pressure-induced superconductivity in antiferromagnetic cerium compounds and a ferromagnetic uranium compound, focusing on the relation between the superconducting state and the Fermi surface instability in CeRhIn 5 and the huge upper critical field Hc2 in CeIrSi 3 without inversion symmetry in the crystal structure. The pairing interaction is well correlated with ferromagnetism, as well as antiferromagnetism or antiferromagnetic fluctuations. In the recently discovered superconductor NpPd5Al2, superconductivity is found to be located in the vicinity of an antiferromagnetically ordered state. The upper critical field Hc2 is strongly supressed by the large paramagneic effect, and the corresponding magnetization curve indicates a step-like increase at Hc2, producing a first-order phase transition.

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