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Assesing the effect of Coulomb repulsion asymmetry on electron pairing
Coulomb repulsion between two moving electrons loses its spherical symmetry
due to relativistic effects. In presence of a uniform positive ion background
this asymmetry uncovers an angular dependent attraction potential in the
direction of motion. The quantum mechanical response to such an attraction
potential is obtained through perturbation. It is shown that the transition
amplitude between states with the symmetry of the attraction potential becomes
negative and if the density of states is anisotropic, occurrence of a
superconducting state becomes possible.Comment: 18 pages, 5 figure
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