Revival of superconductivity in high magnetic fields and a possible p-wave pairing in (TMTSF)2PF6

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Abstract

From the BCS theory, we derive an equation which accounts for quantum effects of an electron motion along open Fermi surfaces and determines the upper critical field Hc2(T) perpendicular to the chains of a quasi-one-dimensional conductor. This equation demonstrates two unusual phenomena: (1) restoration of superconductivity at H>Hc2(0) in p-wave superconductors, where Hc2(0) is the quasiclassical upper critical field; (2) surviving of superconductivity at Hc2(0), Hp<H<HpLOFF in s-wave superconductors, where Hp is the Clogston-Chandrasekhar paramagnetic limiting field; the critical field HpLOFF is introduced in the paper. An analysis of recent experimental data by I. J. Lee, M. J. Naughton, G. M. Danner, and P. M. Chaikin [Phys. Rev. Lett. 78, 3555 (1997)] shows that superconductivity significantly exceeds HpLOFF for b direction of a magnetic field in (TMTSF)2PF6. This demonstrates a strone suppression of the Pauli pair breaking effects and may reflect a p-wave pairing of electrons.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume59
Issue number2
StatePublished - 1999
Externally publishedYes

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Superconductivity
superconductivity
Magnetic fields
Superconducting materials
magnetic fields
BCS theory
Fermi surface
Electrons
restoration
Restoration
Fermi surfaces
electrons
conductors
retarding

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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abstract = "From the BCS theory, we derive an equation which accounts for quantum effects of an electron motion along open Fermi surfaces and determines the upper critical field Hc2⊥(T) perpendicular to the chains of a quasi-one-dimensional conductor. This equation demonstrates two unusual phenomena: (1) restoration of superconductivity at H>Hc2⊥(0) in p-wave superconductors, where Hc2⊥(0) is the quasiclassical upper critical field; (2) surviving of superconductivity at Hc2⊥(0), Hp<H<HpLOFF in s-wave superconductors, where Hp is the Clogston-Chandrasekhar paramagnetic limiting field; the critical field HpLOFF is introduced in the paper. An analysis of recent experimental data by I. J. Lee, M. J. Naughton, G. M. Danner, and P. M. Chaikin [Phys. Rev. Lett. 78, 3555 (1997)] shows that superconductivity significantly exceeds HpLOFF for b direction of a magnetic field in (TMTSF)2PF6. This demonstrates a strone suppression of the Pauli pair breaking effects and may reflect a p-wave pairing of electrons.",
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N2 - From the BCS theory, we derive an equation which accounts for quantum effects of an electron motion along open Fermi surfaces and determines the upper critical field Hc2⊥(T) perpendicular to the chains of a quasi-one-dimensional conductor. This equation demonstrates two unusual phenomena: (1) restoration of superconductivity at H>Hc2⊥(0) in p-wave superconductors, where Hc2⊥(0) is the quasiclassical upper critical field; (2) surviving of superconductivity at Hc2⊥(0), Hp<H<HpLOFF in s-wave superconductors, where Hp is the Clogston-Chandrasekhar paramagnetic limiting field; the critical field HpLOFF is introduced in the paper. An analysis of recent experimental data by I. J. Lee, M. J. Naughton, G. M. Danner, and P. M. Chaikin [Phys. Rev. Lett. 78, 3555 (1997)] shows that superconductivity significantly exceeds HpLOFF for b direction of a magnetic field in (TMTSF)2PF6. This demonstrates a strone suppression of the Pauli pair breaking effects and may reflect a p-wave pairing of electrons.

AB - From the BCS theory, we derive an equation which accounts for quantum effects of an electron motion along open Fermi surfaces and determines the upper critical field Hc2⊥(T) perpendicular to the chains of a quasi-one-dimensional conductor. This equation demonstrates two unusual phenomena: (1) restoration of superconductivity at H>Hc2⊥(0) in p-wave superconductors, where Hc2⊥(0) is the quasiclassical upper critical field; (2) surviving of superconductivity at Hc2⊥(0), Hp<H<HpLOFF in s-wave superconductors, where Hp is the Clogston-Chandrasekhar paramagnetic limiting field; the critical field HpLOFF is introduced in the paper. An analysis of recent experimental data by I. J. Lee, M. J. Naughton, G. M. Danner, and P. M. Chaikin [Phys. Rev. Lett. 78, 3555 (1997)] shows that superconductivity significantly exceeds HpLOFF for b direction of a magnetic field in (TMTSF)2PF6. This demonstrates a strone suppression of the Pauli pair breaking effects and may reflect a p-wave pairing of electrons.

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