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Showing 1 to 20 of 23 for “"lattice site"”.
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A backscattering ion channeling study of the lattice site location of the constituents of two systems
… measurements were performed to determine the lattice site location of the constituents of two systems. For (GaSb) 1_x(Ge2)x spectra were obtained at a set of incident beam orientations along an angular scan through the [110] direction and nearly parallel to the [110) plane. The asymmetry in …
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Carbon Incorporation Pathways and Lattice Site Distributions in Silicon Carbide/silicon(001) and Germanium Carbide/germanium(001) Alloys Grown by Molecular Beam Epitaxy
… I find that all C incorporates in substitutional sites at Ts < 580°C with y ≤ 0.026. At Ts ≥ 580°C, increasing y and Ts leads to increase in the fraction of dicarbon complexes and the formation of periodic bulk planar structures consisting of ordered Si4C layers which form as a …
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Study of ferromagnetic systems with many phase transitions
… bonds whose non trivial projections at each lattice site are unique. The proof is based on the Dobrushin-Pecherski criterion concerning the uniqueness of Gibbs states under perturbations. Such criterion is restated so that only transition functions on sets of simple geometry are involved. In …
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The statistics of finite, one dimensional lattice fluids
"A one dimensional lattice fluid in which particles are allowed to assume only discrete positions is proposed. Particles are free to move from one lattice site to another interacting through a variety of potentials, including the Lennard-Jones type. The model allows the partition function to be …
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ΜΕΛΕΤΗ ΤΟΥ ΜΟΝΤΕΛΛΟΥ HUBBARD ΓΙΑ ΕΛΚΤΙΚΑ ΔΥΝΑΜΙΚΑ ΜΕΤΑΞΥ ΤΩΝ ΗΛΕΚΤΡΟΝΙΩΝ
… ONE-DIMENSIONAL HUBBARD MODEL WITH ATTRACTIVE ON SITE INTERACTIONS BETWEEN ELECTRONS BY USING THE PERIODIC ONE- BODY SELF CONSISTENT STATIC APPROXIMATION. OUR RESULTS ARE IN GOOD AGREEMENT WITH THE EXISTENT MANY-BODY RESULTS, FOR NUMBER OF ELECTRONS PER LATTICE SITE, TAKING ALL VALUES FROM 0 TO 2. …
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Cooperative Behavior in Driven Lattice Systems with Shifted Periodic Boundary Conditions
We explore the nature of driven stochastic lattice systems with non-periodic boundary conditions. The systems consist of particle and holes which move by exchanges of nearest neighbor particle-hole pairs. These exchanges are controlled by the energetics associated with an internal Hamiltonian, an …
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Optical Properties of Rare-Earth Doped YBO3 Phosphor Materials
… terminal oxygen bending mode related to the host lattice site corresponding to yttrium where the dopant ions substite. The structural changes are interpreted as variations in the local neighborhood of these sites in the YBO3:Ce3+,Tb3+,Eu3+ crystal structure.
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Controlling ultracold fermions under a quantum gas microscope
… employing fermionic 40K atoms in an optical lattice, and precision control of the atoms under the microscope. This system works as a natural simulator of the 2D Hubbard model, which describes materials with strongly correlated electrons. After preparing ultracold 40K atoms in an optical …
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Static and dynamic correlation in lattice gas systems : an application to the intermetallic hydride ZrV2Hx
… for the simulation of particle diffusion on a lattice gas ispresented. The particle transition probability is calculated as a function of threeparameters: lattice site energies, inter-particle interactions and neighbour jump-rates.GRT evaluates either the self correlation function, Gs(r,t), or …
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Exploring Atom-Light Scattering in the Quantum Regime
… scenarios. When atoms are confined in optical lattices, light scattering can be used to explore single-body, two-body, and many-body physics. Focusing on single-atom physics, I study coherent and incoherent light scattering of single-atom wavepackets and the relation to which-way information. …
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Self-Assembled Barium Titanate Nanoscale Films by Molecular Beam Epitaxy
… perovskite when barium sits in the titanium lattice site. The BaO-TiO2 phase diagram predicts a low-solubility (<100 ppm) of excess barium oxide at molecular beam epitaxy (MBE) growth temperatures of 600-800 °C. We show that excess barium provided during MBE growth is a self-limiting …
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Inhomogeneous Totally Asymmetric Simple Exclusion Processes: Simulations, Theory and Application to Protein Synthesis
… correspond to particles (covering ell > 1 sites), hopping rates, and the underlying lattice, respectively. As the hopping rates in an mRNA are given by its sequence (in the unit of codons), we are especially interested in the effects of a finite number of slow codons to the overall …
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Equilibrium and Non-equilibrium Monte Carlo Simulations of Microphases and Cluster Crystals
… materials. Cluster crystals in which each lattice site is occupied by multiple particles are formed in systems with steep soft-core repulsive interactions. Dendrimers have been proposed as a potential experimental realization. In order to access and understand the equilibrium properties of …
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Impurities in Antiferromagnetic Transition-metal Oxides – Symmetry and Optical Transitions
… second interpretation is that of metal cation site hopping. In this interpretation, carriers hop from the x2 – y2 d orbital of one metal cation lattice site to the next metal cation site which is antiferromagnetically aligned. At times, thoughout this work, one interpretation is favorable to …
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Photon Statistics in Disordered Lattices
… coherent light traversing disordered photonic lattices and its dependence on the disorder class, the level of disorder and the excitation configuration at the input. Throughout the dissertation, two disorder classes are considered, namely, diagonal and off-diagonal disorders. The latter …
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A Theoretical Development and Simulation-Based Comparison of Four Parameter Estimation Methods for the Spatio-Temporal Autologistic Model with Emphasis on Maximum Generalized and Block Generalized Pseudolikelihood
<p>A regular lattice of spatially dependent binary observations is often modeled using the autologistic model. It is well known that likelihood-based inference methods cannot be employed in the usual way to estimate the parameters of the autologistic model due to the intractability of the …
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A Theoretical Development and Simulation-Based Comparison of Four Parameter Estimation Methods for the Spatio-Temporal Autologistic Model with Emphasis on Maximum Generalized and Block Generalized Pseudolikelihood
<p>A regular lattice of spatially dependent binary observations is often modeled using the autologistic model. It is well known that likelihood-based inference methods cannot be employed in the usual way to estimate the parameters of the autologistic model due to the intractability of the …
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Structural and Electrical Properties of In and C + In implanted Ge, Si, and Si₁ˍₓGeₓ
… percent, all In atoms occupy a substitutional lattice site. The formation of metallic In precipitates and In-vacancy complexes are apparent for In concentrations greater than 0.6 atomic percent. Electrical measurement results were correlated with the determined structural properties. Aiming to …
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Structural and Electrical Properties of In and C + In implanted Ge, Si, and Si₁ˍₓGeₓ
… percent, all In atoms occupy a substitutional lattice site. The formation of metallic In precipitates and In-vacancy complexes are apparent for In concentrations greater than 0.6 atomic percent. Electrical measurement results were correlated with the determined structural properties. Aiming to …
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Effect of Dopants on the Local Atomic Structure and Sintering Behavior of Bismuth Sodium Titanate
… a core issue was to determine the preferred lattice site of Co in BNT. BNT was synthesized from oxide powders using the classic solid-state route and sintered at temperatures ranging from 1000 °C to 1150 °C. Cobalt was added in concentrations between 0.1 mol% and 2.6 mol% Co prior to the …
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