Twin boundaries in d-wave superconductors

Details Twin boundaries in d-wave superconductors Twin boundaries in d-wave superconductors

1997-05-14

arxiv.org/abs/cond-mat/9705139v1

Physics

Condensed Matter

Superconductivity

ReVTeX, 4 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevB.56.R5751

Twin boundaries in orthorhombic d-wave superconductors are investigated numerically using the Bogoliubov-deGennes formalism within the context of an extended Hubbard model. The twin boundaries are represented by tetragonal regions of variable width, with a reduced chemical potential. For sufficiently large twin boundary width and change in chemical potential, an induced s-wave component may break time-reversal symmetry at a low temperature. This temperature, and the magnitude of the complex component, are found to depend strongly on electron density. The results are compared with recent tunneling measurements.

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