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VOLUME 78 (2003) | ISSUE 10 | PAGE 1132
Phase diagram of a surface superconductor in parallel magnetic field
Abstract
Universal phase diagram of 2D surface superconductor with generic Rashba interaction in a parallel magnetic field is found. In addition to uniform BCS state we find two inhomogeneous superconductive states, the stripe phase with \Delta({\bf r})\propto \cos({\bf Qr}) at high magnetic fields, and a new "helical" phase with \Delta({\bf r}) \propto \exp(i{\bf Qr}) which intervenes between BCS state and stripe phase at intermediate magnetic field and temperature. We prove that the ground state for helical phase carries no current.