Ruf, T. and Cardona, M. and Sternschulte, H. and Wahl, S. and Thonke, K. and Sauer, R. and Pavone, P. and Anthony, T. R. (1998) Cathodoluminescence investigation of isotope effects in diamond. SOLID STATE COMMUNICATIONS, 105 (5). pp. 311-316. ISSN 0038-1098, 1879-2766
Full text not available from this repository.Abstract
We report high-resolution cathodoluminescence (CL) measurements near the indirect gap of isotopically modified diamonds. From the energies of intrinsic phonon-assisted peaks, as well as the no-phonon recombination of boron-bound excitons, we determine the contribution of isotope disorder to the frequencies of various phonons with nonzero wave vector. The results confirm calculations of the phonon self-energy based on ab-initio lattice dynamics. For some modes we predict an asymmetric variation of the disorder-induced shift with the C-13 concentration which is observed in second-order Raman spectra. The no-phonon emission from boron-bound excitons (D-0 and D-0' lines) exhibits a fine structure which arises from a splitting of the neutral boron acceptor ground state (2 meV) and the initial bound excitons (3.3 meV). When varying the C-13 content all components shift with a slope of (14.6 +/- 0.5) meV/amu. (C) 1998 Elsevier Science Ltd.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RAMAN-SCATTERING; LATTICE-CONSTANT; TEMPERATURE-DEPENDENCE; DISORDER; SPECTRUM; GE; SEMICONDUCTORS; DYNAMICS; PHONONS; SI |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Feb 2023 10:27 |
| Last Modified: | 28 Feb 2023 10:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50140 |
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