Role of electron-phonon interaction in the strongly correlated cuprates superconductors

Details Role of electron-phonon interaction in the strongly correlated cuprates superconductors Role of electron-phonon interaction in the strongly correlated cuprates superconductors

2001-08-23

arxiv.org/abs/cond-mat/0108381v1

Physics

Condensed Matter

Superconductivity

10 pages, 4 figures

Scientific paper

10.1080/13642810210142735

Using high resolution angle-resolved photoemission data in conjunction with that from neutron and other probes, we show that electron-phonon (el-ph) coupling is strong in cuprates superconductors and it plays an important role in pairing. In addition to the strong electron correlation, the inclusion of phonons provides a theoretical framework explaining many important phenomena that cannot be understood by a strongly correlated electronic model alone. Especially it is indispensable to explain the difference among materials. The phonons with the wave number around the (0,qx) and (qx,0) axes create the d-wave pairing while that near (pi,pi) are pair breaking. Therefore the half-breathing mode of the oxygen motions helps d-wave superconductivity.

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