Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Quantum effect"”.
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Far-infrared radiation response of antenna-coupled quantum-effect devices
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Fabrication of Quantum Effect Devices and Their Characterization in the Ballistic Transport Regime
Transport study in finite lateral superlattices are carried with varying gate numbers of the surface gate fingers. Evidence of potential modulation in the channel induced by the surface gate electrodes is observed. Conductance study suggests formation of a one-dimensional propagating path across …
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Experiments in vibro-impact beam dynamics and a system exhibiting a landau-zener quantum effect
This report describes the model of a system comprised of a cantilever beam bilaterally constrained at the tip where the spacing between the beam and the stop was varied. The purpose of this work was to model the system, simulate it, and validate the numerical results with experimental data. It is …
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Efficient Solution of Large Sparse Eigenvalue Problems in Microelectronic Simulation
… the self-consistent Schrodinger-Poisson model of quantum-effect devices, and the vector Helmholtz equation for a dielectric waveguide, addressing other important physical, numerical and computational issues as they arise. An asymptotic convergence estimate is derived which shows the …
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An Investigation of the Surface Properties of Sic For the Growth of Gan Thin Films and Epilayers
… the best subtrate used in the growth of III-V quantum heterostructures due to a negligible lattice mismatch (~3.5%) between the substrate and the epilayer, compared to sapphire (14%). Considerable amount of research is currently being done all over the world on these III-V compounds, …
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Nonlinear Periodic Structures: From Classical to Quantum Devices
… and their applications in both classical and quantum regime are investigated. New theoretical models are developed, and novel applications of nonlinear periodic structures are proposed and demonstrated. The theoretical studies, both design and simulation, are based on but not limited to …
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Magnetic quartz crystal microbalance
… the resonant frequency changes. This proximity effect is seen at the distance of 10 mm in air and becomes more pronounced as the distance decreases. This effect depends on the value of quality factor, conductivity of the object, and electrical connection of the object to the QCM electrodes. A …
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Quantum transport in gapped graphene
… superlattice Hall bars with a field-effect mobility of up to 220,000 cm$^{2}$ V$^{-1}$ s$^{-1}$ at 9 K with low charge impurities. By aligning hBN and graphene, a ∼33.7 meV band gap at 9 K is demonstrated at the primary Dirac point in zero magnetic field. Furthermore, the nonlocal …
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Learning in Quantum Mechanics
… thesis explores the interactions of learning and quantum mechanics. At its heart, learning consists of extracting information from data. We will consider two types of data; random and deterministic. When data is random, one usually tries to learn an approximation to a desired object, when it is …
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A Radical Approach to Syntheses and Mechanisms
… flash photolysis. Rather than a primary isotope effect (associated with C-H bond cleavage), we believe the observed KIEs are secondary, and can be rationalized on the basis of a quantum effect due to hyperconjugative stabilization in aromatic radical cations during an electron transfer reaction. …
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First-Principles Study of Band Alignment and Electronic Structure at Metal/Oxide Interfaces: An Investigation of Dielectric Breakdown
… into the Al/c-SiO2 interface to study the effects on band offset and electronic structure caused by point defects at metal/oxide interfaces. It is shown that the bonding chemistry at metal/oxide interfaces, which is mainly ionic bond, polarizes the interface. It results in many interface …
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SEMICLASSICAL MOLECULAR DYNAMICS OF ADIABATIC AND NONADIABATIC PROCESSES
… is based on classical mechanics, it neglects the quantum nature of the nuclear motion and will eventually lead to some noticeable deviations from the real behavior of molecular systems. Instead, when considering a quantum picture of the nuclear dynamics all of the previously cited desirable …
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Strongly nonlinear dynamics and acoustics of coupled granular sonic vacua: theoretical and experimental studies
… with regularly placed intruders that act as effective coupling elements. Unlike previous studies of weakly coupled oscillatory chains, the dynamical systems considered herein incorporate both non-smooth effects due to possible separations between interacting neighboring beads (granules), as …