INVESTIGADORES
COMEDI David Mario
artículos
Título:
Evidence of the miniband formation in InGaAsP/InP superlattices
Autor/es:
YU. A. PUSEP; A. DE GIOVANNI RODRIGUEZ; J. C. GALZERANI; D. COMEDI; R. R. LAPIERRE
Revista:
BRAZILIAN JOURNAL OF PHYSICS
Editorial:
SOC BRASILEIRA FISICA
Referencias:
Año: 2006 vol. 36 p. 905 - 907
ISSN:
0103-9733
Resumen:
The formation of the miniband electron energy structure was explored in doped InGaAs/InP superlattices with different periods. The analysis of the Raman data allowed us to conclude that in spite of the defect structure of the layers constituting the superlattices, their super-periodicity was well defined. The quantitative proof of the conditions for break-down of the Raman selection rules is presented: the emergence of the selection rules of the coupled plasmon-LO phonon vibrations was demonstrated to occur due to the increase of their coherence lengths. In addition, the expected anisotropy of the effective electron masses was found by high-field magnetoresistance.
