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2006•AIP conference proceedingsRequires access

Competition between Singlet and Triplet Pairing Superconductivity when Spin and Charge Fluctuations Coexist

Kazuhiko Kuroki, Yukio Tanaka

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Abstract

We study the competition between spin singlet and triplet pairings in a quasi‐one‐dimensional organic superconductor (TMTSF)2PF6, where coexistence of 2kF spin and 2kF charge fluctuations along with the disconnectivity of the Fermi surface favors spin‐triplet f‐wave‐like pairing. Comparison with the situation for a certain model of a cobaltate superconductor NaxCoO2 ⋅yH2O shows that whether the charge fluctuations favor singlet or triplet pairing depends on the character of the underlying spin fluctuations.

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What this paper is about

We study the competition between spin singlet and triplet pairings in a quasi‐one‐dimensional organic superconductor (TMTSF)2PF6, where coexistence of 2kF spin and 2kF charge fluctuations along with the disconnectivity of the Fermi surface favors spin‐triplet f‐wave‐like pairing. Comparison with the situation for a certain model of a cobaltate superconductor NaxCoO2 ⋅yH2O shows that whether the charge fluctuations favor singlet or triplet pairing depends on the character of the underlying spin fluctuations.

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Available abstract

We study the competition between spin singlet and triplet pairings in a quasi‐one‐dimensional organic superconductor (TMTSF)2PF6, where coexistence of 2kF spin and 2kF charge fluctuations along with the disconnectivity of the Fermi surface favors spin‐triplet f‐wave‐like pairing. Comparison with the situation for a certain model of a cobaltate superconductor NaxCoO2 ⋅yH2O shows that whether the charge fluctuations favor singlet or triplet pairing depends on the character of the underlying spin fluctuations.

Key concepts: Pairing, Condensed matter physics, Singlet state, Superconductivity, Spin (aerodynamics), Physics, Charge (physics), Fermi surface

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