Binding energy of a Cooper pairs with non-zero center of mass momentum in d-wave superconductors

Details Binding energy of a Cooper pairs with non-zero center of mass momentum in d-wave superconductors Binding energy of a Cooper pairs with non-zero center of mass momentum in d-wave superconductors

2007-01-23

arxiv.org/abs/cond-mat/0701548v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

The binding energy of Cooper pairs has been calculated for the case of d-wave symmetry of the superconducting gap in layered cuprate superconductors. We assume that Cooper pairs are formed by the short range potential and then derive the binding energy in the form Delta_kq = \Delta_x(q)cos(k_xa) + \Delta_y(q)cos(k_ya) + \Omega_x(q)sin(k_xa) + \Omega_y(q)sin(k_ya), where q is a total momentum of the pair. Numerical solutions of the self-consistent system of the integral equations for quantities \Delta_x(q), \Delta_y(q) and \Omega_x(q), \Omega_y(q) along different lines in q_x, q_y plane have been obtained. Anisotropy of the depairing total momentum (or depairing current) has been calculated.

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