V. Latussek

TL;DR: In this article, the band structure of semimagnetic type-III quantum wells (QW's) was calculated using an eight-band model in an envelope function approach, where the mutual influence of the two-dimensional confinement and the exchange interaction on the transport properties of QW's with low Mn concentrations was analyzed.

TL;DR: In this paper, it has been shown by means of the envelope function approximation using the full $8\ifmmode\times\else\texttimes\fi{}8$ Kane Hamiltonian, that the valence band offset is primarily responsible for the separation between the $H1\ensuremath{-}E1$ and $L1\ENSuremath{\Lambda} intersubband transition energies of semiconducting superlattices and their dependence on temperature.

Abstract: Asymmetrically modulation-doped HgTe quantum wells of (0 0 1) orientation were produced by molecular beam epitaxy. N-type doping was achieved with iodine and p-type doping by the incorporation of nitrogen. At 4.2 K the n-type samples have electron mobilities up to 10 5 cm 2 / Vs , the maximum Hall mobility of the p-type specimens is around 2×10 4 cm 2 / Vs . Very pronounced Shubnikov–de Haas oscillations were observed in both n-type and p-type samples. In the n-type specimens the quantum oscillations persisted up to temperatures of 60 K. The Shubnikov–de Haas oscillations in the p-type samples were highly irregular. Because the data cannot be explained without detailed theoretical calculations of Landau levels for the heterostructure self consistent Hartree calculations were performed using a 8×8 k · p model. The magnetic field-dependent density of states was calculated. More regular oscillations are predicted at higher magnetic fields approaching 30 T.

TL;DR: In this paper, infrared magneto-optical studies of band gaps and electron cyclotron resonances of a narrow-gap HgTe superlattice were conducted at liquidhelium temperatures.

TL;DR: In this article, the cyclotron mass was determined from the temperature dependence of the Shubnikov-de Haas oscillations at low magnetic fields, based on a 8×8 k · p model.