Experimental Test of Theoretical Models for Urbach's Rule at Excitonic Absorption Edges
- 25 February 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 44 (8) , 543-546
- https://doi.org/10.1103/physrevlett.44.543
Abstract
It is shown that electroabsorption measurements provide an elegant test to decide between the two most favored theories of Urbach's rule at excitonic absorption edges, namely the model of the field-ionized exciton by Dow and Redfield and the model of the momentarily trapped exciton by Sumi and Toyozawa. Experiments performed at the intrinsic Urbach tails of the ionic insulators CuCl and TlCl give support to the field-ionization model.Keywords
This publication has 16 references indexed in Scilit:
- Defect-induced electric fields in ZnSSolid State Communications, 1976
- Piezo-Urbach rule for acoustoelectric domains in GaAsPhysical Review B, 1974
- Toward a Unified Theory of Urbach's Rule and Exponential Absorption EdgesPhysical Review B, 1972
- Urbach rulePhysica Status Solidi (a), 1971
- Urbach-Martienseen Rule and Exciton Trapped Momentarily by Lattice VibrationsJournal of the Physics Society Japan, 1971
- Theory of Exponential Absorption Edges in Ionic and Covalent SolidsPhysical Review Letters, 1971
- THE DIRECT ABSORPTION EDGE IN COVALENT SOLIDSApplied Physics Letters, 1967
- Über Temperaturabhängigkeit und Form der langwelligsten Excitonenbande in KJ-KristallenThe European Physical Journal A, 1959
- Über die excitonenbanden der alkalihalogenidkristalleJournal of Physics and Chemistry of Solids, 1957
- The Long-Wavelength Edge of Photographic Sensitivity and of the Electronic Absorption of SolidsPhysical Review B, 1953