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 20 of 296 for “"Band structure"”.
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Shear-band structure in metallic glasses
… is the lack of understanding of how their structure evolves as a function of macroscopic strain. At low homologous temperatures (e.g., operating temperatures of common structural materials), strain localization into shear bands make these defects play a decisive role in controlling the …
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Electronic band structure variations in photothermal catalytic materials
… is sensitively influenced by both the electronic structure of the materials and their interfaces. Yet, the electronic band structure of many of these materials under thermal expansion is under explored. In this study we calculate the electronic structures of a select group of sulfide …
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Dilute nitride semiconductors : band structure, scattering and high field transport
… GaAs and GaSb strongly perturbs the conduction band of the host semiconductor. In this thesis we investigate the effects of nitrogen states on the band dispersion, carrier scattering and mobility of dilute nitride alloys. In the supercell model we solve the single particle Hamiltonian for a very …
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Investigations of the Band Structure and Morphology of Nanostructured Surfaces
… In this dissertation, I examine the electronic structure of two very different types of two-dimensional systems: valence band electrons in single layer graphene and electronic states created at the vacuum interface of single crystal copper surfaces. The characteristics of both electronic systems …
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The modification of graphene band structure by periodic potential perturbation
… of applications. However, it has no intrinsic band gap which means that graphene FETs will have a very low on/off ratio. Several groups have tried to introduce a band gap in graphene artificially, such as etching graphene into nanoribbons. This thesis suggests the possibility to modify …
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Theoretical study on the band structure of Bi1̳-x̳Sbx̳ thin films
The study on the electronic band structures of Bi1-xSbx thin films is a very interesting topic. Recall that in bulk Bi1-xSbx, the electronic band structure can be varied as a function of temperature T, pressure P and stoichiometry. The electronic band structure does not change with T significantly …
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Band structure and gain calculations for gallium nitride quantum-well structures
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Correlation of Photocatalytic Activity with Band Structure of Low-dimensional Semiconductor Nanostructures
… and chemical impregnation methods. The band structures of the low-dimensional semiconductor materials were engineered to overcome the above mentioned two shortcomings. In addition, the correlation between the photocatalytic activity of the low-dimensional semiconductor materials and …
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Interplay between chemical bonding, band structure and charge transport in thermoelectric chalcogenides
… properties have been attributed to complex band structures and intrinsically low lattice thermal conductivities. The present dissertation aims at establishing a novel approach to identify chalcogenides suitable for thermoelectric applications. The work starts by inferring a correlation …
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Investigation of exciton dynamics and electronic band structure of InP and GaAs nanowires
… equivalent to high quality two-dimensional heterostructures. State filling and many-body interaction effects were observed by increasing the carrier densities using pulsed laser excitation.</p><p> Further, polarized TRPL spectroscopy was used to study exciton dynamics in these nanowires at 10K. …
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High Pressure Effects on the Band Structure and Dye-Sensitized Photospectra of Semiconductors
… effect of high pressure (to 10 kilobars) on the band edge structure of n-TiO(,2), n-CdS, and n-CdSe has been investigated using an electrochemical technique. This study presents a novel method of measuring the energy of the band positions. It was found that the 3 meV/kbar increase in the band-gap …
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A nanoscale probe of the quasiparticle band structure for two dimensional electron systems
… microscopy (MR-STM) as a robust nanoscale band structure probe, and reconstruct the multi-component dispersion of Sb(111) surface states. We quantify surface state parameters relevant to spintronics applications, and clarify the relationship between bulk conductivity and surface state …
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Development of Monte-Carlo simulations for III-V semiconductors employing an analytic band-structure
… Arsenide (GaNAs) and the effect that the band structure has on electron transport in these materials. Ensemble Monte-Carlo algorithms are developed in order to determine the electron transport properties of these materials, coupled with derived expressions for a novel band-structure …
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Band structure of silver chloride and silver bromide by the augmented plane wave method
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1964
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The nature of band gaps in ionic compounds and band structure aspects of spin transport
Contains fulltext : 145590.pdf (Publisher’s version ) (Open Access)
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