Exchange-correlation effects in magnetic-field-induced superconductivity

Details Exchange-correlation effects in magnetic-field-induced superconductivity Exchange-correlation effects in magnetic-field-induced superconductivity

2001-10-01

arxiv.org/abs/cond-mat/0110040v1

Phys. Rev. B 65 p. R100515 (2002)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.65.100515

Motivated by recent experiments on the organic superconductor $\lambda-(BETS)_2FeCl_4$ we study the Jaccarino-Peter effect (JPE), the earliest example of magnetic-field-induced superconductivity, from the point of view of current-density-functional theory. It is found that both Meissner (diamagnetic) and Pauli (paramagnetic) pair breaking are suppressed by an exchange-correlation contribution to the vector potential, arising at the sites of the magnetic ions. This explains a number of otherwise puzzling experimental observations, and sheds new light on earlier theories of the JPE.

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