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.
Results
Showing 1 to 20 of 33 for “"interface roughness"”.
-
The Si/SiO2 Interface Roughness
The Si/Si02 interface roughness has important effects on the performance of metal-oxide semiconductor field effect transistor devices, which dominate contemporary integrated circuit technology. There have been intense efforts to study this system due to its importance. In this work, a new …
-
The Si/SiO(2) Interface Roughness
The Si/SiO$\sb2$ interface roughness has important effects on the performance of metal-oxide-semiconductor field effect transistor devices, which dominate contemporary integrated circuit technology. There have been intense efforts to study this system due to its importance. In this work, a new …
-
Silicon/silicon Oxide Interface Roughness Studied by Scanning Tunneling Microscopy
Si/SiO2 interface roughness has been related to the inversion layer carrier mobility degradation, gate dielectric reliability, gate leakage current, and ballistic transmittance, yet the quantitatively measurement of the Si/SiO2 interface has not been achieved at the nanometer scale. For the first …
-
Interface roughness mediated optical decay and carrier dynamics in type II AlAs/GaAs heterostructures
Roughness at the interface between the well and barrier materials in quantum well systems has long been known to be an important factor determining carrier mobility in short period wells. Interface roughness (IR) has also been suggested as a possible decay mechanism in type II AlAs/GaAs …
-
X-ray studies of gallium arsenide-silicon heterostructures
… affects disorder within the film and at the interface. We employ x-ray scattering to explore the structural properties of these layered materials grown by molecular beam epitaxy. The thermal expansion of thick GaAs films on nominal Si(001) is measured with x-ray diffraction. The gallium …
-
MODELLING CELL POPULATION GROWTH
… intermembrane friction on growth kinetics and interface roughness dynamics of epithelial tissue were studied. It is reported that with fine alterations of the mechanical parameters such as the cell-cell adhesion strength, one could reliably reproduce different interface roughness scaling …
-
Nanoscale structure and transport : from atoms to devices
… (UTSOI) structures is presented and applied to interface roughness scattering in transistor channels. Self-consistent potentials and accurate wavefunctions and band structures allow for a direct link between measured electrical response and atomic structure. Atomic-scale interface roughness is …
-
Magnetotransport in low dimensional semiconductor structures
… are always higher in the [233] direction. The interface roughness scattering is a possible cause of the mobility anisotropy. The electron focusing results demonstrate that the effective mass and Fermi surface are isotropic even through the mobility is anisotropic. An explanation is proposed …
-
A study of surface roughness issues in magnetic tunnel junctions
… coupling are greatly modified by introducing the interface roughness into the basic Ferromagnet/Insulator/Ferromagnet structure. Experimentally, the surface roughness of the Ni80Fe20 bottom electrode is controlled by applying an rf substrate bias during the deposition. Magnetic tunnel junction …
-
Photoluminescence studies of carrier dynamics in (indium(x),aluminum(x)) gallium(1-x) arsenic/gallium arsenide quantum well structures
… strain (in lattice-mismatched structures), and interface roughness. Continuous wave (cw) and time-resolved photoluminescence, and photoluminescence excitation (PLE) measurements were used to gain insight into the physics of GaAs alloy quantum structures.
-
Study of the training effect in exchange bias using the domain state model
… model increasing the realism of this model. The interface roughness was introduced in the model, as more representative of realistic exchange bias systems. Furthermore, different crystallographic structures such as body-centered cubic and hexagonal-close packed, were investigated as in these …
-
Numerical investigation of load transfer mechanisms in slopes reinforced with piles
… on piles in piled-slopes is sensitive to the interface roughness, pile spacing, modeling techniques, and constitutive model. For the 3-D model, which includes both the sliding and anchorage zones, the limit soil pressure calculated for the "flow" failure mode is approximately equal to that …
-
Cross-Sectional Scanning Tunneling Microscopy Investigations of Cleaved Iii-V Heterostructures
… XSTM has proved useful in characterizing interface roughness, alloy fluctuations and individual atomic positions.
-
Exciton transport and thermodynamics in gallium arsenide quantum wells
… the experimental results with a model based on interface-roughness scattering.
-
Press fit design : force and torque testing of steel dowel pins in brass and nylon samples
… press fit theory well suggesting that the interface pressure of the press fit can be accurately predicted by theory. The brass torque samples matched theory well once material yield conditions were taken into account. The creep sensitivity of the nylon samples made predictions over the …
-
Analysis of the electron transport properties in quantum cascade lasers
… (e-e), electron-impurity (e-imp)and electron-interface roughness scattering. This thesis details the development and calculation results for different models for the electron transport in THz QCLs. Using a semi-classical Monte Carlo simulation, including e-e and e-LO-phonon scattering as well …
-
Monte Carlo study of current variability in UTB SOI DG MOSFETs
… scattering from phonons, Coulomb interactions, interface roughness and body thickness fluctuation. Here, the effect of the last scattering mechanism on the drive current is examined as it is considered a significant limitation to device performance for body thicknesses below 5 nm. A simulation …
-
Optical dielectric properties of YBa2Cu3O6+x and Ba1-xKxBiO
… function of the surface and knowledge of the interface (roughness, geometry, surface layers, etc.). We have constructed a rotating analyzer ellipsometer (RAE) and modified it to allow measurement of samples significantly smaller than the extent of the incident beam (sample dimensions of about …
-
Basal Stability of Braced Circular Excavations in Isotropic and Anisotropic Clays
… depth (D), clay thickness (T), and soil-wall interface roughness (Rint) below the excavation. In the next phase of the study, the NGI-ADP anisotropic strength model was utilized. In this set of analyses, the anisotropy ratio (SuP/SuA), strength gradient (kH/Suo), initial mobilization ratio …
-
Manufacturability of gallium arsenide/aluminum gallium arsenide lasers grown by molecular beam epitaxy
… quality of $Al\sb{x}Ga\sb{1-x}As$ layers, the interface roughness, and the control of residual oxygen incorporation into the active region. Based on MBE growth experiments, a model for the incorporation, desorption and accumulation of oxygen during epitaxial growth of optical quality AlGaAs …
Page 1 of 2