Superconducting 2D System with Lifted Spin Degeneracy: Mixed Singlet-Triplet State

Abstract

Motivated by recent experimental findings, we have developed a theory of the superconducting state for 2D metals without inversion symmetry modeling the geometry of a surface superconducting layer in a field-effect-transistor or near the boundary doped by adsorbed ions. In such systems the two-fold spin degeneracy is lifted by spin-orbit interaction, and singlet and triplet pairings are mixed in the wave function of the Cooper pairs. As a result, spin magnetic susceptibility becomes anisotropic and Knight shift retains finite and rather high value at T=0.

Locations

• Physical Review Letters - View
• arXiv (Cornell University) - View - PDF
• Digital Access to Scholarship at Harvard (DASH) (Harvard University) - View - PDF
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