Orbital-limiting and modulation induced by missing parity in non-centrosymmetric superconductors

Abstract

We examine the depairing field $H_{c2}(T)$ of non-centrosymmetric superconductors with a spin-orbit coupling larger than the Zeeman energy at $H_{c2}(0)$ by taking account of the mixing of spin-singlet and triplet pairing states due to the missing parity. When the singlet and triplet pairing components are mixed with an equal weight in a cubic non-centrosymmetric system, the paramagnetic depairing effect is significantly suppressed so that $H_{c2}(T)$ approaches its orbital-limited value. A similar event also occurs in a quasi two-dimensional Rashba non-centrosymmetric system. The present results are relevant to the $H$-$T$ phase diagrams of CePt${}_3$Si and the families of Li${}_2$Pd${}_{3-x}$Pt${}_x$B.

4 figures, To appear in Phys. Rev. B

References in corpus (11)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Superconductivty without inversion symmetry: MnSi versus CePt_3Si
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Helical vortex phase in the non-centrosymmetric CePt_3Si
• Theory of 2D superconductor with broken inversion symmetry
• Magnetic properties of superconductors with strong spin-orbit coupling
• Effects of Pauli paramagnetism on superconducting vortex phase diagram in strong fields
• Magnetic Properties in Non-centrosymmetric Superconductors with and without Antiferromagnetic Order
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Signature of superconducting states in cubic crystal without inversion symmetry
• Electrodynamics of Fulde-Ferrell-Larkin-Ovchinnikov superconducting state

Cited by in corpus (7)

• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Modulated vortex states in Rashba non-centrosymmetric superconductors
• Nature and symmetry of the order parameter of the noncentrosymmetric superconductor Li2Pt3B
• Singlet-triplet mixing in the order parameter of the noncentrosymmetric superconductor Ru${}_7$B${}_3$
• Superconducting meron phase in locally noncentrosymmetric superconductors
• Adherence of the rotating vortex lattice in the noncentrosymmetric superconductor Ru${}_7$B${}_3$ to the London model
• Magnetic excitations in the helical Rashba superconductor