Electron cyclotron resonance in In1-xMnxAs

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

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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
Issue number1-3
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.


  • Cyclotron resonance
  • Diluted magnetic semicondustors
  • High magnetic fields

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