Electron-phonon coupling in cuprate high-temperature superconductors determined from electron relaxation rates

摘要

Electron-phonon interaction (EPI) is decisive for determining the functional properties of materials. It is a main scattering process in electron conduction and is vital for the formation of ordered electronic states such as charge-density waves. Its strength λ<ω²* is most reliably and straightforwardly determined from femtosecond relaxation times τe-ph due to electron-phonon interaction, according to the expression λ<ω^{2BTl/3ℏχe-p, with Tl being the lattice temperature [1].}