ISSN:
1572-9559
Keywords:
semiconductors
;
Pb1−xGexTe
;
cyclotron resonance
;
phase transitions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Magneto-optical experiments are reported which demonstrate the influence of the structural phase transition in Pb1−xGexTe (x〈0.012) on the band structure. Cyclotron resonance has been observed both above and below Tc. Above Tc the band structure is similar to that of PbTe with four equivalent valleys at the L-point in both conduction and valence bands. At Tc a rhombohedral phase transition occurs and the valleys are split into a singly degenerate (T) valley and three equivalent (L) valleys. The effective masses and relative band-edge energies for the different types of valley are deduced.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01007328
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