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CONDENSED MATTER

Phase diagram of a surface superconductor in parallel magnetic field

O. V. Dimitrova, M. V. Feigel'man

L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences

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 $\Delta (\mathbf{r})\propto \cos (\mathbf{Qr})$ at high magnetic fields, and a new «helical» phase with $\Delta (\mathbf {r}) \propto \exp (i\mathbf{Qr})$ 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.

PACS: 74.50.+r, 74.80. Fr

Received: 14.10.2003

Language: English

 English version: Journal of Experimental and Theoretical Physics Letters, 2003, 78:10, 637–641

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