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The 3d-to-4s-by-2p highway to superconductivity in cuprates

T. M. Mishonov·J. O. Indekeu·E. S. Penev
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Abstract

High-temperature superconductors are nowadays found in great variety and hold technological promise. It is still an unsolved mystery that the critical temperature T_c of the basic cuprates is so high. The answer might well be hidden in a conventional corner of theoretical physics, overlooked in the recent hunt for exotic explanations of new effects in these materials. A forgotten intra-atomic s-d two-electron exchange in the Cu atom is found to provide a strong (~eV) electron pairing interaction. A Bardeen-Cooper-Schrieffer approach can explain the main experimental observations and predict the correct d_{x^2-y^2} symmetry of the gap.

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T. M. Mishonov, J. O. Indekeu, E. S. Penev. 2002-06-18. The 3d-to-4s-by-2p highway to superconductivity in cuprates. https://doi.org/10.1142/s0217979202014991

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