Pässler, R. and Blaschta, F. and Griebl, E. and Papagelis, K. and Haserer, B. and Reisinger, T. and Ves, S. and Gebhardt, Wolfgang (1997) Temperature and composition dependence of exciton peak positions and band gap energies of Zn1-xMgx(<= 0.19)Se epitaxial films. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 204 (2). pp. 685-699. ISSN 0370-1972, 1521-3951
Full text not available from this repository. (Request a copy)Abstract
The temperature dependence of the Is exciton energy has been measured in Zn1-xMgxSe epitaxial films sat compositions x=0, 0.07, 0.12, and 0.19 from 2 K up to 280 K. Detailed numerical fits of the individual temperature dependences are provided on the basis of an analytical four-parameter representation developed recently by one of the authors. These are compared with previously used three-parameter models of Villa et al. and Varshni. The cc-dependence of the exciton energy, E-1s(T, x), and of the fundamental band gap energy, E-g(T, x), is given to very good approximation by linear functions of the composition x for any T from absolute zero up to room temperature. A comparison with recent room temperature band gap energy data by Jobst et al. shows that this linear dependence holds up to x approximate to 0.7. The magnitudes of the model-dependent empirical parameters, which control the temperature dependence of the band gap energy in different compounds, are found to change significantly with increasing magnesium content. From the magnitude of the effective phonon temperature, particularly in the case of ZnSe, we conclude that the main contributions to the band gap shrinkage effect are due to acoustic phonons.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ZNSE; GAAS; SEMICONDUCTORS; TRANSITIONS; ZN1-XMGXSE; GERMANIUM; EDGE; GE; SI |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Mar 2023 06:56 |
| Last Modified: | 02 Mar 2023 06:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50388 |
Actions (login required)
 |
View Item |
