ONE-CENTER SMALL POLARONS AS SHORT-LIVED PRECURSORS IN SELF-TRAPPING PROCESSES OF HOLES AND ELECTRON-HOLE PAIRS IN ALKALI IODIDES

Citation
S. Iwai et al., ONE-CENTER SMALL POLARONS AS SHORT-LIVED PRECURSORS IN SELF-TRAPPING PROCESSES OF HOLES AND ELECTRON-HOLE PAIRS IN ALKALI IODIDES, Physical review letters, 76(10), 1996, pp. 1691-1694
Citations number
20
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
76
Issue
10
Year of publication
1996
Pages
1691 - 1694
Database
ISI
SICI code
0031-9007(1996)76:10<1691:OSPASP>2.0.ZU;2-7
Abstract
Initial processes of self-trapping of holes and electron-hole pairs in KI and RbI crystals have been investigated by means of a femtosecond pump-probe spectroscopy. We have found that a new short-lived intermed iate is formed as a precursor of the self-trapped hole in the form of the halogen molecular ion with a D-2h symmetry. This state is identifi ed to be a one-center type self-trapped hole on the basis of the quant um mechanical cluster calculations. A one-center self-trapped state is also created as a precursor for self-trapped excitons.