Essays about: "2DEG"
Found 5 essays containing the word 2DEG.
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1. Modelling of injection of electrons by low-dimensional nanowire into a reservoir
University essay from Linköpings universitet/Teoretisk FysikAbstract : High-mobility two-dimensional electron gas (2DEG) which resides at the interface between GaAs and AlGaAs layered semiconductors has been used experimentally and theoretically to study ballistic electron transport. The present project is motivated by recent experiments in magnetic electron focusing. READ MORE
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2. Quantized Transmission in an Asymmetrically Biased Quantum Point Contact
University essay from Linköpings universitet/Teoretisk FysikAbstract : In this project work we have studied how a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs semiconductor heterostructure can be locally confined down to a narrow bottleneck constriction called a quantum point contact (QPC) and form an artificial quantum wire using a split-gate technique by application of negative bias voltages. The electron transport through the QPC and how asymmetric loading of bias voltages affects the nature of quantized conductance were studied. READ MORE
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3. Spin-FET based on InGaAs/InP heterostructure
University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysikAbstract : A new design based on the spinFET proposed by Datta-Das was fabricated, using a channel defined by etching on a 2DEG material and nanomagnets as top-gates. The magnetotransports properties were measured at low temperatures. READ MORE
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4. Electron transport in quantum point contacts : A theoretical study
University essay from Institutionen för datavetenskap, fysik och matematik, DFMAbstract : Electron transport in mesoscopic systems, such as quantum point contacts and Aharonov-Bohm rings are investigated numerically in a tight-binding language with a recursive Green's function algorithm. The simulation reveals among other things the quantized nature of the conductance in point contacts, the Hall conductance, the decreasing sensitivity to scattering impurities in a magnetic field, and the periodic magnetoconductance in an Aharonov-Bohm ring. READ MORE
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5. Characterization of AlGaN HEMT structures
University essay from Institutionen för fysik, kemi och biologiAbstract : During the last decade, AlGaN High Electron Mobility Transistors (HEMTs) have been intensively studied because their fundamental electrical properties make them attractive for highpower microwave device applications. Despite much progress, AlGaN HEMTs are far from fully understood and judged by the number of published papers the understanding of advanced structures is even poorer. READ MORE