Possible singlet-to-triplet pairing transition in NaxCoO 2·yH2O

M. M. Maśka; M. Mierzejewski; B. Andrzejewski; M. L. Foo; R. J. Cava; T. Klimczuk

doi:10.1103/PhysRevB.70.144516

Possible singlet-to-triplet pairing transition in Na_xCoO ₂·yH₂O

M. M. Maśka, M. Mierzejewski, B. Andrzejewski, M. L. Foo, R. J. Cava, T. Klimczuk

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We present precise measurements of the upper critical field (H _c2) in the recently discovered cobalt oxide superconductor. We have found that the critical field has an unusual temperature dependence; namely, there is an abrupt change of the slope of H_c2(T) in a weak-field regime. In order to explain this result we have derived and solved Gor'kov equations on a triangular lattice. Our experimental results may be interpreted in terms of the field-induced transition from singlet to triplet superconductivity.

Original language	English (US)
Article number	144516
Pages (from-to)	144516-1-144516-5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.70.144516
State	Published - Oct 2004

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.70.144516

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title = "Possible singlet-to-triplet pairing transition in NaxCoO 2·yH2O",

abstract = "We present precise measurements of the upper critical field (H c2) in the recently discovered cobalt oxide superconductor. We have found that the critical field has an unusual temperature dependence; namely, there is an abrupt change of the slope of Hc2(T) in a weak-field regime. In order to explain this result we have derived and solved Gor'kov equations on a triangular lattice. Our experimental results may be interpreted in terms of the field-induced transition from singlet to triplet superconductivity.",

author = "Ma{\'s}ka, {M. M.} and M. Mierzejewski and B. Andrzejewski and Foo, {M. L.} and Cava, {R. J.} and T. Klimczuk",

note = "Funding Information: B.A. acknowledges support from the Centre of Excellence for Magnetic and Molecular Materials for Future Electronics within the EC Contract No. G5MA-CT-2002-04049; M.M.M. acknowledges support from the Polish State Committee for Scientific Research, Grant No. 2 P03B 050 23. T.K. acknowledges support from the Foundation for Polish Science. The work at Princeton is supported by the U. S. Department of Energy, Grant No. DE-FG02-98-ER45706 and the NSF, Grant No. DMR-0244254.",

year = "2004",

month = oct,

doi = "10.1103/PhysRevB.70.144516",

language = "English (US)",

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AU - Maśka, M. M.

AU - Mierzejewski, M.

AU - Andrzejewski, B.

AU - Foo, M. L.

AU - Cava, R. J.

AU - Klimczuk, T.

N1 - Funding Information: B.A. acknowledges support from the Centre of Excellence for Magnetic and Molecular Materials for Future Electronics within the EC Contract No. G5MA-CT-2002-04049; M.M.M. acknowledges support from the Polish State Committee for Scientific Research, Grant No. 2 P03B 050 23. T.K. acknowledges support from the Foundation for Polish Science. The work at Princeton is supported by the U. S. Department of Energy, Grant No. DE-FG02-98-ER45706 and the NSF, Grant No. DMR-0244254.

PY - 2004/10

Y1 - 2004/10

N2 - We present precise measurements of the upper critical field (H c2) in the recently discovered cobalt oxide superconductor. We have found that the critical field has an unusual temperature dependence; namely, there is an abrupt change of the slope of Hc2(T) in a weak-field regime. In order to explain this result we have derived and solved Gor'kov equations on a triangular lattice. Our experimental results may be interpreted in terms of the field-induced transition from singlet to triplet superconductivity.

AB - We present precise measurements of the upper critical field (H c2) in the recently discovered cobalt oxide superconductor. We have found that the critical field has an unusual temperature dependence; namely, there is an abrupt change of the slope of Hc2(T) in a weak-field regime. In order to explain this result we have derived and solved Gor'kov equations on a triangular lattice. Our experimental results may be interpreted in terms of the field-induced transition from singlet to triplet superconductivity.

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Possible singlet-to-triplet pairing transition in Na_xCoO ₂·yH₂O

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