Raman electron paramagnetic resonance in Zn1-xCoxTe and Cd1-xCoxTe
- Authors
- Seong, M.J.; Alawadhi, H.; Miotkowski, I.; Ramdas, A.K.; Miotkowska, S.
- Issue Date
- Mar-2001
- Citation
- Physical Review B - Condensed Matter and Materials Physics, v.63, no.12, pp 1252081 - 1252087
- Pages
- 7
- Journal Title
- Physical Review B - Condensed Matter and Materials Physics
- Volume
- 63
- Number
- 12
- Start Page
- 1252081
- End Page
- 1252087
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/56819
- DOI
- 10.1103/physrevb.63.125208
- ISSN
- 0163-1829
- Abstract
- Electronic Raman transitions due to the spin flip of the 3d electrons of Co2+ in Zn1-xCoxTe and Cd1-xCoxTe (x≤0.01) are observed at ℏωPM=g(Co2+)μBH with g(Co2+)=2.295±0.010 and 2.310±0.002, respectively. The intensity of Raman electron paramagnetic resonance (Raman-EPR) shows strong resonant enhancement when the incident or scattered photon energy coincides with that of a Zeeman component of the free exciton. Under resonant conditions, the Raman spectra display ZnTe-like (or CdTe-like) and CoTe-like longitudinal optical (LO) phonons in combination with the spin-flip transitions, a consequence of the Fröhlich interaction. In Zn1-xCoxTe, even the ZnTe-like TO phonon exhibited EPR sidebands but mediated by the deformation potential; the large p-d spin-spin exchange interaction in Co2+-based II-VI diluted magnetic semiconductors is the underlying microscopic mechanism.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.