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Article
Spin properties of trions in a dense quasi-2D electron gas
The reflection and photoluminescence spectra of modulation-doped CdTe/CdMgTe quantum-well structures have been studied. It was found that the magnitude and sign of the Zeeman splitting of the trion reflection ...
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Article
Stability of Singlet- and Triplet-Charged Excitons in CdTe/CdMgTe Two-Dimensional Electron Systems Around ν = 1
Magnetoluminescence experiments in CdTe/CdMgTe single-quantum well with dense two-dimensional electron gases are performed at high magnetic fields up to 35 T. A broad photoluminescence peak, which originates i...
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Article
p-type in ZnO:N by codo** with Cr
We report on the fabrication of p-ZnO films by thermal oxidation of Zn3N2 deposited by reactive rf sputtering. With additional chromium do** we achieved p-type conductivity with the hole concentration ∼5×1017cm
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Article
Carrier-Concentration and Magnetic-Field Effect on Mn2+ Luminescence in Bulk Zn1−x Mn x Te Crystals
Measurements of photoluminescence, reflectance, and Hall effect as functions of the phosphorus do** level, temperature, and magnetic field in p-Zn1−x Mn x Te crystals are repor...
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Chapter and Conference Paper
Combined Exciton-Electron Optical Processes in Optical Spectra of Modulation Doped QWs
We present a detailed study of combined exciton-electron processes in modulation doped quantum well structures contain a 2DEG of low density. We observed resonance exciton-electron processes in magnetic fields...
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Article
Optical Properties of Semimagnetic Quantum Dots
Measurements of optical properties of epitaxially grown CdMnTe quantum dots are presented. Magnetic ions are incorporated into the structure by passivating the substrate surface with Mn prior the quantum dot d...
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Article
Resonant photoluminescence and excitation spectroscopy of CdSe/ZnSe and CdTe/ZnTe self-assembled quantum dots
We show that two major carrier excitation mechanisms are present in II-VI self-assembled quantum dots. The first one is related to direct excited state–ground state transition. It manifests itself by the prese...
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Article
Inhomogeneous broadening of exciton lines in magneto-optical reflection from CdTe/CdMgTe quantum wells
A spectroscopic method is proposed to determine parameters of homogeneous and inhomogeneous broadening for excitons confined in semiconductor quantum wells with free carriers. By measuring the optical reflecti...
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Chapter
Magnetooptical Properties of Graded Quantum Well Structures Made of Diluted Magnetic Semiconductors
We report on magnetooptical studies of Cdl-xMnxTe and Cd1-yMgyTe spatially graded quantum well (QW) structures. The photoluminescence excitation and transmission spectra were measured in a magnetic field for trap...
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Chapter
Combined Exciton-Electron Processes in Modulation Doped Quantum Well Structures
Combined exciton-electron processes were studied in modulation doped quantum well structures in magnetic fields. In the case of such combined processes an incident photon creates an exciton and induces a trans...
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Chapter
A New Opportunity of Probing Lateral Distortions in Quantum Wells
The in-plane distortions of quantum well structures as revealed by polarised luminescence are studied. It is shown that C2v, distortions induce an extreme anisotropy of the in-plane g factor of quantum confined h...
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Article
Orthorhombic symmetry of valence-band states in CdTe/Cd1−x MnxTe quantum wells
A study is reported of the anisotropy in magnetic-field-induced linear polarization in (001) CdTe/Cd1−x MnxTe quantum wells. The observed limiting anisotropy is shown to be due to the low C 2v symmetry of the qu...
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Article
Influence of nonequilibrium phonons on exciton luminescence in CdTe/CdMnTe quantum wells
The luminescence method has been employed for the first time to detect nonequilibrium phonons in CdTe quantum wells with Cd0.6Mn0.4Te barriers. The method makes use of the giant Zeeman splitting of exciton states...
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Article
Trions in quantum-well structures with two-dimensional electron gas
A study has been made of bound exciton-electron complexes (trions) and unbound exciton-electron states (combined exciton-cyclotron resonance) from reflectance spectra obtained from modulation-doped CdTe/CdMgTe...
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Article
Dimensionality crossover in spin glass of Cd0.50Mn0.50Te thin films
SQUID measurements of the time decay of the thermoremanent magnetization at long time scale, 102<t<105 s, are presented for MBE grown Cd0.50Mn0.50Te. We found that for both thin, (32 Å) and thick (2500 Å) layers ...
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Article
Magnetic origin of the temperature variation of the band offsets in the CdTe/(Cd, Mn)Te heterostructures
Precise-temperature-dependent measurements of energy of excitons confined in CdTe/CdMnTe quantum wells and superlattices were performed between 2 K and 100 K. We show that magnetic fluctuations lead to a varia...
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Chapter and Conference Paper
Spin Dependent Scattering in (Cd1−x−yZnxMny)3As2 from the Shubnikov-de Haas Waveshape Analysis
The study of the Shubnikov-de Haas effect (SdH) in (Cd1− x−yZnxMnY)3As2 with x=0.03 and y=0.006 has been performed in high magnetic fields up to 25 T. From the detailed waveshape analysis of SdH oscillations, the...
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Chapter and Conference Paper
Shubnikov-de Haas Effect in Hg1−xMnxSe:Fe
Fe donor level in HgSe is degenerate with the conduction band and lies about 210 meV above its edge [1] (see, lower part of Fig. 1a). This fact gives rise to several unusual properties of Fe doped HgSe [see, e...
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Chapter and Conference Paper
Spin Modulated Energy State by Shubnikov-de Haas Analysis in Hg1-x-yCdxMnyTe at High Magnetic Fields
The dilute magnetic(or semimagnetic) semiconductor(DMS) alloys have presented lots of interesting phenomena not only concerning Landau spin subband energy states influenced by the exchange interaction between ban...
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Chapter
Quantum Wells and Superlattices of Diluted Magnetic Semiconductors
Diluted magnetic semiconductors (DMS) are semiconducting alloys containing substitutional transition metal ions.1 In this paper we shall concentrate on the most thoroughly understood group of these materials, i.e...
