Berlin 2005 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 17: Poster Ib
HL 17.7: Poster
Freitag, 4. März 2005, 16:30–19:00, Poster TU F
FIR-MIR Fourier transform spectroscopy of Zn1−xMnxSe epilayers grown by molecular-beam epitaxy — •K. C. Agarwal, B. Daniel, C. Klingshirn, and M. Hetterich — Institut für Angewandte Physik and Center for Functional Nanostructures (CFN), Universität Karlsruhe, D-76131 Karlsruhe, Germany
Zn1−xMnxSe is one of the most widely studied diluted magnetic semiconductors (DMS). Recently, DMS like Zn1−xMnxSe have been demonstrated to be useful as spin aligners, important ingredients for possible spin-based opto-electronic devices. In this contribution, we present the results of our investigations of n-doped and undoped ZnMnSe epilayers grown by molecular beam epitaxy (MBE) on GaAs(001) substrate. From plasma edge reflection studies of n-doped Zn1−xMnxSe epilayers (0≤ x≤ 0.13), the carrier density dependent electron effective mass and transport properties are determined for different Mn contents. In addition, FIR investigations of undoped Zn1−xMnxSe epilayers were used to study the temperature dependence of phonons and the high frequency dielectric constant in this material for various Mn contents (0≤ x≤ 0.78).