Anisotropy of the Upper Critical Field in (TMTSF)2PF6

I. J. Lee; M. J. Naughton; G. M. Danner; P. M. Chaikin

doi:10.1103/PhysRevLett.78.3555

Anisotropy of the Upper Critical Field in (TMTSF)₂PF₆

I. J. Lee, M. J. Naughton, G. M. Danner, P. M. Chaikin

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Abstract

The temperature dependence of the upper critical magnetic field H_c2(T) in the quasi-one-dimensional molecular superconductor (TMTSF)₂PF₆ was determined via resistivity, for the intrachain (a) interchain (b), and interplane (c) ^* directions. For H along a and b, H_c2(T) exhibits pronounced positive curvature, with no sign of saturation to 0.1 K. A novel anisotropy inversion is observed, H_c2^b grows larger than H_c2^a and exceeds the paramagnetic limit by more than 200%. The anomalous shape of H_c2(T) is consistent with recent predictions of unconventional behavior in anisotropic superconductors, including the possibility of triplet pairing and reentrant superconductivity in very high field.

Original language	English (US)
Pages (from-to)	3555-3558
Number of pages	4
Journal	Physical Review Letters
Volume	78
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.78.3555
State	Published - May 5 1997

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General Physics and Astronomy

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abstract = "The temperature dependence of the upper critical magnetic field Hc2(T) in the quasi-one-dimensional molecular superconductor (TMTSF)2PF6 was determined via resistivity, for the intrachain (a) interchain (b), and interplane (c) * directions. For H along a and b, Hc2(T) exhibits pronounced positive curvature, with no sign of saturation to 0.1 K. A novel anisotropy inversion is observed, Hc2b grows larger than Hc2a and exceeds the paramagnetic limit by more than 200%. The anomalous shape of Hc2(T) is consistent with recent predictions of unconventional behavior in anisotropic superconductors, including the possibility of triplet pairing and reentrant superconductivity in very high field.",

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AU - Lee, I. J.

AU - Naughton, M. J.

AU - Danner, G. M.

AU - Chaikin, P. M.

PY - 1997/5/5

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N2 - The temperature dependence of the upper critical magnetic field Hc2(T) in the quasi-one-dimensional molecular superconductor (TMTSF)2PF6 was determined via resistivity, for the intrachain (a) interchain (b), and interplane (c) * directions. For H along a and b, Hc2(T) exhibits pronounced positive curvature, with no sign of saturation to 0.1 K. A novel anisotropy inversion is observed, Hc2b grows larger than Hc2a and exceeds the paramagnetic limit by more than 200%. The anomalous shape of Hc2(T) is consistent with recent predictions of unconventional behavior in anisotropic superconductors, including the possibility of triplet pairing and reentrant superconductivity in very high field.

AB - The temperature dependence of the upper critical magnetic field Hc2(T) in the quasi-one-dimensional molecular superconductor (TMTSF)2PF6 was determined via resistivity, for the intrachain (a) interchain (b), and interplane (c) * directions. For H along a and b, Hc2(T) exhibits pronounced positive curvature, with no sign of saturation to 0.1 K. A novel anisotropy inversion is observed, Hc2b grows larger than Hc2a and exceeds the paramagnetic limit by more than 200%. The anomalous shape of Hc2(T) is consistent with recent predictions of unconventional behavior in anisotropic superconductors, including the possibility of triplet pairing and reentrant superconductivity in very high field.

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Anisotropy of the Upper Critical Field in (TMTSF)₂PF₆

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