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Temperature Dependence of the Cyclotron Mass in n-Type CdS

Devreese, J. T. ; Fomin, V. M. ; Gladilin, V. N. ; Imanaka, Y. ; Miura, N.

Physica B 298 (2001) 207-210 [Periódico revisado por pares]

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  • Título:
    Temperature Dependence of the Cyclotron Mass in n-Type CdS
  • Autor: Devreese, J. T. ; Fomin, V. M. ; Gladilin, V. N. ; Imanaka, Y. ; Miura, N.
  • Assuntos: Condensed Matter - Statistical Mechanics
  • É parte de: Physica B 298 (2001) 207-210
  • Descrição: Recent cyclotron resonance experiments in n-type CdS at ultra-high magnetic fields have revealed a pronounced maximum of the electron cyclotron mass as a function of temperature. In order to interpret these data, we calculate the magneto-absorption spectra of polarons in n-CdS using the arbitrary-coupling approach. We show that in high magnetic fields the polaron effects beyond the weak-coupling approximation clearly reveal themselves in the magneto-optical absorption even at relatively small values of the Froehlich coupling constant. In particular, those effects result in a non-monotonous behaviour of the cyclotron mass as a function of temperature. We extend the theory to take into account a combined effect of several scattering mechanisms on the magneto-absorption spectra. The extended theory allows us to interpret quantitatively the experimentally observed behaviour of the cyclotron mass in CdS. Comment: 4 pages, 3 figures, E-mail addresses: devreese@uia.ua.ac.be, fomin@uia.ua.ac.be

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