The superconducting state in (TMTSF)2PF6 in high magnetic field

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

doi:10.1016/S0379-6779(00)01027-4

The superconducting state in (TMTSF)₂PF₆ in high magnetic field

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

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

Abstract

The resistive upper critical field along the b-axis (H_c2//b) in (TMTSF)₂PF₆ is investigated in detail in fields to 17.5 T and temperatures to T/T_c ∼ 1/60, at various pressures near the border between spin density wave and metallic states. Previously, we had obtained a novel crossover where H_c2//b exceeded both H_c2//a, in contrast to band structure, and the Pauli paramagnetic limit μ_oH_p≈ 2 T. Remarkably, in an optimum pressure setting reported here, it is found that the onset of superconductivity persists up to 9 T (> 4 H_p), which strongly suggests triplet Cooper pairing. Strong upward curvature with nearly diverging behaviour of the critical field also seem to suggest a field-dependent dimensional crossover, although the H_c2 enhancement is considerably more than that predicted by recent theories.

Original language	English (US)
Pages (from-to)	915-916
Number of pages	2
Journal	Synthetic Metals
Volume	120
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(00)01027-4
State	Published - Mar 15 2001

Keywords

Organic superconductors
Superconducting phase transitions

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0379-6779(00)01027-4

Cite this

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abstract = "The resistive upper critical field along the b-axis (Hc2//b) in (TMTSF)2PF6 is investigated in detail in fields to 17.5 T and temperatures to T/Tc ∼ 1/60, at various pressures near the border between spin density wave and metallic states. Previously, we had obtained a novel crossover where Hc2//b exceeded both Hc2//a, in contrast to band structure, and the Pauli paramagnetic limit μoHp≈ 2 T. Remarkably, in an optimum pressure setting reported here, it is found that the onset of superconductivity persists up to 9 T (> 4 Hp), which strongly suggests triplet Cooper pairing. Strong upward curvature with nearly diverging behaviour of the critical field also seem to suggest a field-dependent dimensional crossover, although the Hc2 enhancement is considerably more than that predicted by recent theories.",

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N2 - The resistive upper critical field along the b-axis (Hc2//b) in (TMTSF)2PF6 is investigated in detail in fields to 17.5 T and temperatures to T/Tc ∼ 1/60, at various pressures near the border between spin density wave and metallic states. Previously, we had obtained a novel crossover where Hc2//b exceeded both Hc2//a, in contrast to band structure, and the Pauli paramagnetic limit μoHp≈ 2 T. Remarkably, in an optimum pressure setting reported here, it is found that the onset of superconductivity persists up to 9 T (> 4 Hp), which strongly suggests triplet Cooper pairing. Strong upward curvature with nearly diverging behaviour of the critical field also seem to suggest a field-dependent dimensional crossover, although the Hc2 enhancement is considerably more than that predicted by recent theories.

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