A MAGNETOREFLECTION STUDY OF ARSENIC AND BISMUTH.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING
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The report describes studies of the band structure of the semimetals, arsenic and bismuth, using the magnetoreflection technique. In arsenic, two new series of oscillations in the magnetoreflectivity have been found. One series of oscillations, observed when the magnetic field is perpendicular to the trigonal axis, seems to be associated with direct interband transitions between two bands with a critical point at T in the Brillouin zone. A second series of oscillations is observed when the magnetic field is parallel to the trigonal axis and is associated with direct interband transitions between two bands with a critical point along the Q axis in the Brillouin zone, using the symmetry notation of Lin and Falicov. Oscillations in the magnetoreflectivity were also observed for bismuth. These oscillations are associated with direct interband transitions between the valence and electronic conduction bands, which have a critical point at L in the Brillouin zone. The lineshape of the oscillations in the magnetoreflectivity were calculated, using the Lax model.
- Solid State Physics