Photoinduced IR absorption in AMnO(3) as a function of the a site ionic species

Authors
Mertelj, T Hrovat, M Kuscer, D Mihailovic, D
Citation
T. Mertelj et al., Photoinduced IR absorption in AMnO(3) as a function of the a site ionic species, INT J MOD B, 14(29-31), 2000, pp. 3590-3595
Citations number
26
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
14
Issue
29-31
Year of publication
2000
Pages
3590 - 3595
Database
ISI
SICI code
0217-9792(200012)14:29-31<3590:PIAIAA>2.0.ZU;2-#
Abstract
A comparison of photoinduced absorption spectra in AMnO(3) with A = La3+, N d3+, Ca2+ is presented. The spectra are analyzed in the framework of photon assisted polaron hopping. In contrast to LaMnO3 and NdMnO3 the photoinduce d absorption spectrum of CaMnO3 shows distinct contributions from photoexci ted holes and electrons. Both contributions are identified, and our results imply that magnitude of electron-phonon coupling constant for electrons in Mn e(g) orbitals in CaMnO3 is significantly smaller than in LaMnO3.