Fermi arcs as a visible manifestation of pair level of negative-U centers - Condensed Matter > SuperconductivityReport as inadecuate




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Abstract: Here we consider the possibility that the Fermi arcs observed in ARPESexperiments result from interaction of valence band electrons with negative-Ucenters NUCs which are formed under doping on the pairs of neighboring Cucations in CuO2 plane. This interaction results in two-particle hybridizationand vanishing of the gap over the part of Fermi contour. Furthermore thetransitions of electrons to NUCs result in the generation of free holecarriers. Just these carriers rather than doping induced charges provideconduction in the normal state.



Author: K.V. Mitsen, O.M. Ivanenko

Source: https://arxiv.org/



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