Klotz, S. and Besson, J. M. and Braden, M. and Karch, K. and Bechstedt, F. and Strauch, Dieter and Pavone, P. (1996) Transverse acoustic phonons of germanium up to 9.7 GPa by neutron inelastic scattering. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 198 (1). pp. 105-113. ISSN 0370-1972, 1521-3951
Full text not available from this repository.Abstract
Recent progress in high pressure neutron techniques now permits the measurement of the phonon dispersion curves of germanium at pressures up to 10 GPa. Inelastic neutron scattering measurements on 25 mm(3) single crystals have been performed for the first time up to 9.7 GPa, that is close to its pressure-induced phase transition. Frequency Variations of the phonon modes were measured along the [100], [110], and [III] directions and are shown to have a nonlinear volume dependence for all wavevectors. These results are compared with published data on the behaviour of TA modes in tetrahedral semiconductors and with recent calculations using the density functional formalism. The agreement between experiment and theory is remarkable and underlines the potential of ab initio calculations for accurately describing the lattice dynamics of semiconductors at variable density.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-PRESSURES; DISPERSION; DEPENDENCE; GE |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Dieter Strauch |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Jun 2023 09:53 |
| Last Modified: | 21 Jun 2023 09:53 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51396 |
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