Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state

Details Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state

2001-03-21

arxiv.org/abs/cond-mat/0103449v1

Physics

Condensed Matter

Superconductivity

5 pages, no figures

Scientific paper

10.1103/PhysRevLett.87.037004

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.

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