Protonated Ozone:  Structure, Energetics, and Nonadiabatic Effects

1999 ◽  
Vol 103 (48) ◽  
pp. 9984-9994 ◽  
Author(s):  
Michele Ceotto ◽  
Franco A. Gianturco ◽  
David M. Hirst
Keyword(s):  
Nonadiabatic Effects

Topological study of nonadiabatic effects in Π electronic states of tetra-atomic molecules

2018 ◽  
Vol 116 (19-20) ◽  
pp. 2671-2685 ◽  
Author(s):  
Marko Mitić ◽  
Milan Milovanović ◽  
Radomir Ranković ◽  
Stanka Jerosimić ◽  
Miljenko Perić
Keyword(s):  
Electronic States ◽  
Nonadiabatic Effects

Nonadiabatic effects in the photoelectron spectra of HCl and DCl. II. Theory

2001 ◽  
Vol 65 (1) ◽  
Author(s):  
L. Mauritz Andersson ◽  
Florian Burmeister ◽  
Hans O. Karlsson ◽  
Osvaldo Goscinski
Keyword(s):  
Photoelectron Spectra ◽  
Nonadiabatic Effects

scholarly journals NONADIABATIC THEORY OF THE SUPERCONDUCTING STATE

2000 ◽  
Vol 14 (25n27) ◽  
pp. 2976-2981 ◽  
Author(s):  
MICHELA BOTTI ◽  
EMMANUELE CAPPELLUTI ◽  
CLAUDIO GRIMALDI ◽  
LUCIANO PIETRONERO
Keyword(s):  
Phonon Frequency ◽  
Superconducting Order Parameter ◽  
Charge Carriers ◽  
Superconducting Gap ◽  
Phonon Coupling ◽  
Eliashberg Theory ◽  
Frequency Scale ◽  
Electron Phonon Coupling ◽  
Normal State Properties ◽  
Nonadiabatic Effects

Fermi energies in fullerence compounds and cuprates are extremely small as consequence of the small number of charge carriers and are comparable to the phonon frequency scale. In this situation the conventional Migdal-Eliashberg theory does not hold anymore and nonadiabatic effects need to be taken into account. In previous studies, a generalization of Eliashberg theory in the nonadiabatic regime has been proposed to calculate normal state properties and the onset temperature T c of the superconductive phase. Here we extend the nonadiabatic theory below T c where the opening of the superconducting order parameter affects the nonadiabatic correction. The superconducting gap Δ is calculated in a self-consistent way. We find that large values of the ratio 2Δ/T c are obtained in the nonadiabatic theory by smaller electron-phonon coupling λ than in Migdal-Eliashberg theory. This agrees with the picture that strong-coupling phenomenology can be achieved in nonadiabatic theory by "reasonable" values of λ. We apply our analysis to the case of the fullerene compounds.

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