Breakdown of the Migdal-Eliashberg theory in the strong-coupling adiabatic regime
In view of some recent works on the role of vertex corrections in the electron-phonon system we readress an important question of the validity of the Migdal-Eliashberg theory. Based on the solution of the Holstein model and inverse coupling constant expansion, we argue that the standard Feynman-Dyso...
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| Format: | Default Preprint |
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2001
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| Online Access: | https://hdl.handle.net/2134/1144 |
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