title: Evidence for light-induced hole polarons in LiNbO3.
abstract: Transient light-induced absorption in LiNbO3 is observed in the blue-green spectral range after pulsed illumination with 532 nm. Its buildup and decay in Fe-doped LiNbO3 is satisfactorily described by a sum of two stretched exponential functions. For undoped LiNbO3, however, only one stretched exponential decay is observed. These experimental results are explained by the formation of both small Nb(Li)4+ electron polarons and O- hole polarons. The mechanism is discussed on the basis of a proposed band scheme.
authors.affiliation: Institut für Mineralogie, Universität zu Köln, 50674 Köln, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Herth
authors.forename: T
authors.initials: T
authors.lastname: Granzow
authors.forename: D
authors.initials: D
authors.lastname: Schaniel
authors.forename: Th
authors.initials: T
authors.lastname: Woike
authors.forename: M
authors.initials: M
authors.lastname: Imlau
authors.forename: E
authors.initials: E
authors.lastname: Krätzig