Band in ARPES caused by photodissociation of Landau-Pekar polarons

Details Band in ARPES caused by photodissociation of Landau-Pekar polarons Band in ARPES caused by photodissociation of Landau-Pekar polarons

2007-04-14

arxiv.org/abs/0704.1870v1

Physics

Condensed Matter

Superconductivity

8 pages, 6 figures

Scientific paper

We consider decay of phonon condensate into phonons at photodissociation of the strong coupling large polaron (SCLP), when the charge carrier becomes free. Expression to calculate the band in ARPES caused by photodissociation of SCLP is obtained. The band in ARPES caused by photodissociation of strong-coupling large-radius polarons is a broad band with the shape determined by Poisson distribution. It can be structured or unstructured depending on the phonon dispersion since a distance between neighbouring lines comprising the band is the phonon energy. Half-width of the band is in the interval 1.3 - 1.7Ep, depending on the phonon energy. The band maximum is situated approximately at the electron energy Ephot-W-3.2Ep (where Ephot is the photon energy, W is work function), and its position does not depend on the electron wave vector direction.

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