Enhanced triplet superconductivity in noncentrosymmetric systems

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

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Abstract

We study pairing symmetry of noncentrosymmetric superconductors based on the extended Hubbard model on the square lattice near half-filling, using the random phase approximation. We show that d+f -wave pairing is favored and the triplet f -wave state is enhanced by Rashba-type spin-orbit coupling originating from the broken inversion symmetry. The enhanced triplet superconductivity stems from the increase of the effective interaction for the triplet pairing and the reduction of the spin susceptibility caused by the Rashba-type spin-orbit coupling which lead to the increase of the triplet component and the destruction of the singlet one, respectively.

Original languageEnglish
Article number172511
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number17
DOIs
Publication statusPublished - May 31 2007
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

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