Electron cyclotron resonance in In1-xMnxAs

Y. H. Matsuda, T. Ikaida, N. Miura, M. A. Zudov, J. Kono, H. Munekata

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8 Scopus citations

Abstract

We have made the first observation of cyclotron resonance in In1-xMnxAs alloys. Our data unambiguously show that the effective mass of electrons systematically decreases with increasing Mn concentration x. Using an 8-band k·p method, we demonstrate that this mass reduction is a combined effect of (1) a decrease of the band gap and (2) an effective reduction of the momentum matrix element P due to the sp-d hybridization. We also observed a significant mass decrease with decreasing temperature, its temperature coefficient slightly depending on x. The temperature dependent sp-d-interaction-enhanced Landau level spin splitting cannot account for this unusual temperature dependence.

Original languageEnglish (US)
Pages (from-to)219-223
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume10
Issue number1-3
DOIs
StatePublished - May 2001
Externally publishedYes

Bibliographical note

Funding Information:
This work was partially supported by Grant-in-Aid for Scientific Research on Priority Area “Spin Controlled Semiconductor Nanostructures” (No. 11125205) from the Ministry of Education, Science, Sports, and Culture, and the NEDO International Joint Research Grant Program.

Keywords

  • Cyclotron resonance
  • Diluted magnetic semicondustors
  • High magnetic fields

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