Dresden 2009 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 9: Poster 1
HL 9.77: Poster
Monday, March 23, 2009, 14:30–17:00, P2
FIR and Microwaves Spectroscopy on Two-Dimensional Hole Systems in Mn doped InAs Quantum Wells — •C. G.v.Westarp, N. Mecking, W. Hansen, D. Heitmann, and U. Wurstbauer — Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg
We have investigated hole systems in InAs quantum wells sandwiched in between InGaAs and InAlAs layers. One serie of our samples was modulation doped in the AlGaAs by δ carbon doping and by manganese co-doping, another series was doped with manganese. We have performed microwave and FIR transmission spectroscopy, covering the range of 60 GHz to 9000 GHz (300 cm−1) at low temperatures (1.6 K) and perpendicular magnetic fields up to 14 T.
We observe a well pronounced cyclotron resonance with a non-parabolic effective mass with typical values of 0.1 me at high magnetic fields. On some samples additional resonances are found with exhibit an anticrossing with the cyclotron resonance.
We gratefully acknowledge support through SFB 508.