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Key Ingredients for Superconductivity in Cuprates

Z. -X. Shen·A. Lanzara·N. Nagaosa
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Abstract

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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Z. -X. Shen, A. Lanzara, N. Nagaosa. 2002-01-08. Key Ingredients for Superconductivity in Cuprates. https://arxiv.org/abs/cond-mat/0102244

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