Effect of nonadiabaticity on the Fermi-edge photoemission and tunneling spectra of superconductors

✍ Scribed by Pavol Baňacký; Michal Svrček; Vojtech Szöcs

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 905 KB
• Volume: 58
• Category: Article
• ISSN: 0020-7608
• DOI: 10.1002/(sici)1097-461x(1996)58:5<487::aid-qua6>3.0.co;2-u

✦ Synopsis

Temperature dependence of the experimental photoemission spectra of the high-T, superconductors have been interpreted and simulated by the recently formulated molecular nonadiabatic theory of the electron-vibrational interaction. The change of the spectral feature below T,, particularly formation of the narrow, near Fermi surface (FS) edge, peak separated by the dip from a broad spectral band at higher binding energies has been shown to be the consequence of the nonadiabatic electron-phonon coupling and corresponding properties of the nonadiabatic polarons. Simulation yields very good fit to the experimental temperature-dependent spectra, with the calculated value of the gap 30.5 meV.