Polaronic effects in the photoemission spectra of strongly coupled electron-phonon systems
- 1 June 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 45 (22), 13109-13112
- https://doi.org/10.1103/physrevb.45.13109
Abstract
The angle-resolved photoemission spectrum is derived for systems with strong electron-phonon coupling. Polaronic features of the charge carriers are manifest in a broad spectrum, with a maximum at an energy (below the Fermi energy) corresponding to the polaron binding energy. In the strong-coupling limit and with dispersionless phonons an oscillatory structure is superposed on this broad spectrum with a frequency equal to the characteristic phonon frequency.Keywords
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