Band-structure enhancement of the indirect forbidden transitions
- 15 December 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 20 (12) , 5292-5296
- https://doi.org/10.1103/physrevb.20.5292
Abstract
We present an experimental investigation of the resonant enhancement of the indirect forbidden transitions near a direct-indirect crossover. Near-resonance conditions have been achieved in Ti by tuning the relative energy positions of a direct forbidden gap (3.031 eV) with respect to an indirect one (3.049 eV). We find a band-structure enhancement of the indirect absorption strength when crossing the direct-forbidden gap. The quantitative details of the experiment can be satisfactorily accounted for by a simple model which includes (i) the stress-induced breaking of the selection rules and (ii) the resonance effect. Uniaxial compressions up to 24 kbars in [100] direction have been found necessary to tune the band gaps.
Keywords
This publication has 8 references indexed in Scilit:
- Uniaxial stress dependence of the direct-forbidden and indirect-allowed transitions of TiPhysical Review B, 1978
- Fine structure in the intrinsic absorption edge of TiPhysical Review B, 1978
- Resolved Quadrupolar Transition in TiPhysical Review Letters, 1977
- Electronic band structure of titanium dioxidePhysical Review B, 1977
- Luminescence and direct experimental observations of band-structure effects in nitrogen-doped GaxIn1−xP alloysJournal of Applied Physics, 1977
- Direct Study of the Nature of Nitrogen Bound States in:NPhysical Review Letters, 1976
- Evidence for Radiative Recombination in () Involving an Isolated Nitrogen Impurity State Associated with the MinimumPhysical Review Letters, 1976
- Intensity of Optical Absorption by ExcitonsPhysical Review B, 1957