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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 10 of 10 for “"semiconductor superlattices"”.
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Nonlinear transport in semiconductor superlattices
… for transport through a single miniband of a semiconductor superlattice subject to a spatially uniform, time-dependent external electric field and/or a constant external magnetic field. The balance equations are derived from the semiclassical Boltzmann transport equation and include energy and …
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Nonlinear and Chaotic Spatio-temporal Dynamics in Semiconductor Superlattices
Die Ladungsträgerdynamik in Halbleiterübergittern wird theoretisch auf der Grundlage eines semiklassischen sequentiellen Tunnelmodells untersucht. Abhängig von den Modellparametern ergeben sich dabei laufende oder stationäre Anreicherungs- und Verarmungsfronten der Elektronen. Besonders …
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Raman scattering studies of aluminum gallium arsenide based semiconductor superlattices
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T18:26:47Z No. of bitstreams: 1 1984_colvard.pdf: 4295312 bytes, checksum: ce5ff950ef04db12f158f3816d50fdc1 (MD5)
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Raman Scattering Studies of Aluminum-Gallium - Arsenide Based Semiconductor Superlattices (Phonons, Interfaces)
… measurements have been made on more than twenty semiconductor superlattices, all grown by molecular beam epitaxy and based on the Al(,x)Ga(,1-x)As system. The samples consist of undoped layers with alternating values of x along the {001} direction, and have periods ranging from 20(ANGSTROM) to …
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Feasibility of superconductivity in semiconductor superlatices
… this thesis is to explore superconductivity in semiconductor superlattices of alternating hole and electron layers. The feasibility of superconductivity in semiconductor superlattices is based on a model formulated by Harshrnan and Mills. In this model, a semiconductor superlattice forms the …
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Expanding ultrafast photoacoustics for investigation of mechanical properties and thermal transport
… shear modes. Strained piezoelectric InGaN/GaN semiconductor superlattices were used to generate and to study longitudinal THz acoustic phonons in GaN based structures. During the investigation of the lifetime of up to a 1.4 THz frequency acoustic phonons, specular reflection from an air/GaN …
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Toward ultra-broadband photoacoustic spectroscopy of supercooled liquids
… acoustic generation, experiments on semiconductor superlattices (SLs) composed of alternating layers of gallium arsenide (GaAs) and aluminum arsenide (AlAs) and multiple quantum well structures (MQW) of indium gallium nitride (InGaN) and gallium nitride (GaN) as photoacoustic …
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BLUE-SHIFT OF EFFECTIVE BAND-GAP IN N-I-P-I DOPING SUPERLATTICES AS A FUNCTION OF OPTICAL EXCITATION INTENSITY
N-i-p-i doping superlattices are a special class of semiconductor superlattices which have been studied extensively and many devices have been realised. One of the important characteristics of the n-i-p-i doping superlattices is the tunability of their electronic structure by external excitation, …
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Spectroscopy of Topological Materials and their Technological Applications
… from thermalization of phonons in disordered semiconductor superlattices. The second part of the dissertation focuses on technological applications of topological materials following their experimental discovery and recent theoretical developments. Topological materials may possess unique …
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Unipolar barrier strained layer superlattice infrared photodiodes : physics and barrier engineering
… regimes. The bandstructure of InAs/GaSb/AlSb superlattices has been simulated in this work using empirical pseudopotential method. The simulation results have been used extensively in the later part of this work for designing heterojunction T2SL photodetectors. The interfaces between the …