Superflow in d-wave superconductors

Details Superflow in d-wave superconductors Superflow in d-wave superconductors

1998-06-20

arxiv.org/abs/cond-mat/9806247v1

Physics

Condensed Matter

Superconductivity

10 pages, 8 eps figures included

Scientific paper

10.1006/spmi.1999.0751

Superflow in a phenomenological tight-binding model for the superconducting state of some High-temperature superconductors is discussed thoroughly. The formalism used is explicitly gauge-invariant and currents are computed exactly within BCS theory, going therefore beyond linear response theory. The dependence of gap functions, current density, critical currents, and free energy as a function of superfluid velocity for different angles and doping concentrations is investigated. Different sources of anisotropy, like the dispersion relation of the model, the internal symmetry of the order parameter, and orthorhombic distortions of the lattice are also studied.

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