Article

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

Zhi‐Xun Shena Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory , Stanford University , California , 94305 , USAAlessandra Lanzaraa Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory , Stanford University , California , 94305 , USASumio Ishiharac Department of Applied Physics , University of Tokyo , Bunkyo-ku, Tokyo , 113-8656 , JapanNaoto Nagaosac Department of Applied Physics , University of Tokyo , Bunkyo-ku, Tokyo , 113-8656 , Japan

2002en

ABI

Abstract

Abstract Using high-resolution angle-resolved photoemission data in conjunction with that from neutron and other probes, we show that electron-phonon coupling is strong in cuprate superconductors and that 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. In particular, it is indispensable to explain the difference among materials. The phonons with the wavenumber around the (0, qy ) and (qx , 0) axes create d-wave pairing while that near (π, π) are pair breaking. Therefore the half-breathing mode of the oxygen motions helps d-wave superconductivity.

Identifiers

DOI: 10.1080/13642810208220725

Citations and references

Cited by 20 references

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