Enhanced triplet superconductivity in noncentrosymmetric systems

Takehito Yokoyama; Seiichiro Onari; Yukio Tanaka

doi:10.1103/PhysRevB.75.172511

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Enhanced triplet superconductivity in noncentrosymmetric systems

Takehito Yokoyama, Seiichiro Onari, Yukio Tanaka

DOI 10.1103/PhysRevB.75.172511 · Physical Review B

T1

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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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pd3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Li2Pt3B Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown