Spin currents, relativistic effects and the Darwin interaction in the theory of hole superconductivity

Details Spin currents, relativistic effects and the Darwin interaction in the theory of hole superconductivity Spin currents, relativistic effects and the Darwin interaction in the theory of hole superconductivity

2005-08-19

arxiv.org/abs/cond-mat/0508471v1

Phys.Lett. A Vol. 345, p. 453 (2005)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.physleta.2005.07.035

The existence of macroscopic spin currents in the ground state of superconductors is predicted within the theory of hole superconductivity. Here it is shown that the electromagnetic Darwin interaction is attractive for spin currents and repulsive for charge currents. It is also shown that the mere existence of spin currents implies that some electrons are moving at relativistic speeds in macroscopic superconductors, which in turn implies that the Darwin interaction plays a fundamental role in stabilizing the superconducting state.

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