Abstract
Raman electron paramagnetic resonance (Raman-EPR) of the transitions due to the spin flip of the 3d electrons of Cr+ in Zn1-xCrxTe and Cd1-xCrxTe is observed at h omega(PM)=g(Cr+)mu B-B with g(Cr+)=2.0041 +/- 0.0095 and 2.0039 +/- 0.0093, respectively. The appearance of Raman lines at omega(LO)+/- n omega(PM), n=1, 2, and 3 results from the strong Frohlich interaction with the zone-center longitudinal-optic phonon. The intensity of the Raman-EPR of Cr+ can be enhanced through the photogeneration process by simultaneous illumination with photons having an energy close to the excitonic band gap; photoluminescence spectra reveal signatures of excitons bound to Cr+ acceptors in Zn1-xCrxTe specimens. The resonance profile of Cr+ Raman-EPR shows that the strong resonant enhancement is mediated via an exciton bound to a neutral acceptor.
Published in:
Physical Review B 75,15 (2007) 155206;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevB.75.155206
Keywords
Physics, Condensed Matter
Date of Version
January 2007
Recommended Citation
Lu, X.; Tsoi, S.; Miotkowski, I.; Rodriguez, S.; Ramdas, A. K.; and Alawadhi, H., "Raman electron paramagnetic resonance in Zn1-xCrxTe and Cd1-xCrxTe" (2007). Department of Physics and Astronomy Faculty Publications. Paper 749.
https://docs.lib.purdue.edu/physics_articles/749