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Chapter and Conference Paper
Photoluminescence Studies of Landau Transitions in GaAs/AlGaAs Multiple Quantum Wells
Photoluminescence has emerged as a fruitful technique for the study of energy levels of both electrons and holes in modulation-doped GaAs/AlGaAs heterostructures.1,2,3 In this work, we have continued our studies ...
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Chapter and Conference Paper
Magneto-Luminescence in Modulation-Doped AlGaAs-GaAs Multiple Quantum Well Heterostructures
The interband magneto-photoluminescence spectrum of n-type modulation-doped multiple quantum well heterostructures of AlxGa1-xAs-GaAs has been studied in magnetic fields up to 19 Tesla. The fields were applied pa...
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Article
Magnetoreflectivity Study of Excitons in MBE Grown Zn1−xFexSe Crystals
We present a magnetoreflectivity study of the excitons in MBE grown Zn1−xFexSe crystals for x=0.017, 0.027 and 0.043. The excitonic spin-splitting was studied as function of magnetic field in both the Faraday and...
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Article
3d Transition Metals in II-VI Semiconductors
The magnetic and electronic properties of some II-VI semiconductors with 3d transition metals other man Mn are presented. For example, the nonzero orbital moment in Fe2+ leads to more complex electronic energy le...
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Article
MBE Growth and Characterization of Fe- and Co-Based Diluted Magnetic Semiconductors
We have grown single crystal zincblende epilayers of the diluted magnetic semiconductors Zn1−xFexSe and Zn1−xCoxSe on GaAs(001) by molecular beam epitaxy. We summarize the growth and the structural, magnetic and ...
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Article
Long hole spin relaxation times in diluted magnetic semiconductor heterostructures
We report the observation of long spin lifetimes for heavy holes in (Zn,Mn)Se and (Zn,Fe)Se based heterostructures. These long spin relaxation times are observed in both simple strained epilayers, as well as i...
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Article
Kinetics of Hydrogen Evolution and Crystallization in Hydrogenated Amorphous Silicon Films Studied by Thermal Analysis and Raman Scattering
We observed the processes of hydrogen evolution and crystallization in hydrogenated amorphous silicon 0.5–7 µm thick films (deposited by de glow discharge on molybdenum) by differential scanning calorimetry (D...
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Article
Laser Annealing of Hydrogenated Amorphous Silicon Thick Films
Hydrogenated amorphous silicon thick films deposited by dc glow discharge on molybdenum substrates were annealed by a pulsed Nd:glass laser. Mass spectrometry showed hydrogen remaining in all the laser anneale...
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Article
Kinetics of Diamond-Like Film Growth Using Filament-Assisted Chemical Vapor Deposition
A detailed kinetic model of diamond-like film growth from methane diluted in hydrogen using low-pressure, filament-assisted chemical vapor deposition (FACVD) has been developed. The model includes both gas-pha...
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Article
RF Aerosol Mist Plasma Deposition of Oxide Films
We report new results on nano-scaled oxide films deposited by an RF aerosol mist plasma technique: including indium tin oxide transparent conductive films; yttria stabilized zirconia, nickel iron oxide/YSZ cer...
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Article
Silicon wafers at sub-μm separation for confined4He experiments
We have successfully achieved a uniform sub-μm gap between two flat silicon surfaces. This is done using two 2″ diameter, 0.010″ thick silicon wafers, one of which has a small central hole used later for exper...
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Article
Cadmium Sulfide Films Deposited by Cw Laser Evaporation Technique
Cadmium Sulfide (CdS) thin films had been fabricated by a laser deposition technique. Our previous results indicated that the hexagonal structured films could be formed at a substrate temperature of 400 C or h...
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Article
AORTIC THROMBOSIS IN CATHETERIZED NEONATES AND INDICATIONS OF HAEMOSTASIS ACTIVATION. 162
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Chapter
Internal Transitions of Neutral and Negatively Charged Magnetoexcitons in GaAs Nanostructures: The Importance of Symmetry
Cyclotron Resonance (CR) of free electrons and holes and internal transitions of their bound complexes have been studied in GaAs/AlGaAs quantum wells in high magnetic fields by Optically Detected Resonance (OD...
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Article
Vapor Phase Synthesis of II-IV Semiconductor Nanoparticles in a Counterflow Jet Reactor
The vapor-phase synthesis of polycrystalline ZnSe nanoparticles is reported. The particles were grown at room temperature and at a pressure of 125 torr in a counterflow jet reactor and were collected by impact...
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Chapter and Conference Paper
Internal Transitions of Negatively Charged Excitons and Many-Electron Effects in GaAs Quantum Wells
States of charged magnetoexcitons in quasi-two-dimensional systems are investigated. The effect of excess electrons on internal transitions of negatively charged excitons X− in GaAs quantum wells is studied exper...
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Article
Magneto-Spectroscopy of Two-Dimensional Systems: Many- and Few-Body Effects
We present a classification of states and exact optical selection rules for charged electron–hole (e-h) complexes in magnetic fields that follow from magnetic translations and axial symmetry. A possibility to ...
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Article
Electrical Spin Injection and Transport in Semiconductor Spintronic Devices
Semiconductor heterostructures that utilize carrier spin as a new degree of freedom offer entirely new functionality and enhanced performance over conventional devices. We describe the essential requirements f...
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Article
RFA assisted liver resection combined with hanging manoeuvre: The alternative option for safe and bloodless major hepatectomy
Major and complex liver resections constitute a particular group of demanding operations which can be easily complicated by severe haemorrhage during vascular approach and liver resection, even when performed ...
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Article
Open AccessSerous cystadenocarcinoma of the pancreas: report of a case and management reflections
Serous adenomas represent 1-2% of pancreatic neoplasms and typically are asymptomatic not requiring any treatment and simple observation is the option of choice. Although, they carry a realistic risk of malign...