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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 20 of 46 for “"Moiré"”.
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Moiré interferometry at high temperatures
… at high temperature by using high-sensitivity moiré interferometry. This was achieved by a new approach of performing deformation measurements at high temperatures in a vacuum oven using an achromatic interferometer. The moiré system setup was designed with particular consideration for the …
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Wigner crystallization in moiré materials
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Aspects of Moiré Quantum Matter
The advent of moiré quantum matter has newly unified disparate themes in modern condensed matter physics, chief among them band theory, correlations, and topology. This thesis investigates how the interplay between these foundational elements leads to novel electronic phenomena uniquely enabled by …
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Bloch-oscillating Electrons in Moiré Superlattices
The extremely narrow bands in moiré materials harbor surprising transport regimes not accessible in other materials. As discussed in this thesis, a large superlattice periodicity and narrow bandwidth create an appealing setting for realizing and probing electronic Bloch oscillations. A key property …
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Moiré interferometry for out-of-plane displacement measurements
Moiré interferometry is a relatively new branch of photomechanics that utilizes a diffraction grating on the specimen to determine surface displacements. To date, it has been used primarily to determine in-plane displacements of the specimen surface. The objective of this work is to demonstrate …
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Hofstadter Physics and Composite Fermionic Phase in Moiré Systems
… explores the intricate electronic phenomena in Moiré systems, particularly focusing on twisted bilayer transition metal dichalcogenides (TMD). These systems, with their unique superlattice structures and strong electron correlations, provide fertile ground for investigating novel quantum states. …
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Advances in displacement and strain analysis by moiré interferometry
Moiré interferometry was developed and extended in two related areas: (1) high density displacement fringes of excellent quality were obtained with a sensitivity of 97.6% of the theoretical maximum, and (2) the complete state of strain on the surface of a tensile specimen with a central hole was …
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Integration and processing of high-resolution moiré-interferometry data
A new hybrid method combining moire interferometry, high resolution data-reduction technique, two-dimensional datasmoothing method, and Finite Element Method (FEM) has been successfully developed. This hybrid method has been applied to residual strain analyses of composite panels, strain …
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Automated visual inspection of general curvature surfaces using Moiré interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988.
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Six degrees of freedom estimation using monocular vision and moiré patterns
We present the vision-based estimation of the position and orientation of an object using a single camera relative to a novel target that incorporates the use of moire patterns. The objective is to acquire the six degree of freedom estimation that is essential for the operation of vehicles in close …
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Three-particle mechanism for unconventional superconductivity with potential applications in moiré materials
… argue that this mechanism should apply to some moiré materials, but also to ZrNCl and WTe₂, for which it predicts an experimentally observable spin-triplet order parameter. Faithfully describing two of the most important class of unconventional superconductors – dilute superconductors with large …
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Photocurrent Spectroscopy Study of Graphene / Hexagonal Boron Nitride Moiré Superlattice In the Far-Infrared Regime
… their heterostructures, especially those with moiré superlattices, have been one of the most fascinating topics in physics in recent years. Many interesting physics, for example the correlated insulating state at half- or quarter- fillings of the moiré band, happened in the far-infrared energy …
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Thermomechanical strain analysis of electronic packages using Moiré interferometry by computational and manual fringe reduction
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Fabrication process changes for performance improvement of an RF MEMS resonator : conformable contact lithography, Moiré alignment, and chlorine dry etching
… etching for improved fine-feature patterning and Moiré -based alignment techniques to allow for a non-self-aligned process. The resulting control over feature size and structure are expected to improve Q and enable higher frequency resonators. A CCL process utilizing moir6 alignment marks is …
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High-pressure studies of atomically-thin van der Waals materials
Two-dimensional (2D) materials and Moiré superlattices formed by certain stacking configurations of 2D crystals, represent a new frontier for quantum matter research due the emergent properties associated to their reduced dimensionality and tunability. To glean insight into the physics of these …
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Strongly Correlated 2D Electronic Systems: Interplay between Band Topology and Electron-electron Interaction
In recent years, a new type of 2D materials, moiré superlattice materials, has been made in laboratories and exhibits interesting behavior including superconductivity at “high” temperature, strange metals, correlated insulators, ferromagnetism, etc.[1, 2] Inspired by these experiments, we studied …
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The Electronic Compressibility of Rhombohedral Graphene Multilayers
… boron nitride (hBN) substrate to form a moiré superlattice. Motivated by the recent discovery of the fractional quantum anomalous Hall effect in this system when the electrons are pushed away from the moiré interface by an external electric displacement field, we study the opposite …
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Emergent Quantum Phenomena in Magic-Angle Twisted Graphene Superlattices
… wealth of emergent quantum phenomena. Recently, moiré engineering, also known as twistronics, has emerged as a new approach for creating twodimensional correlated materials. In this thesis, I designed and studied novel moiré quantum matter based on twisted graphene superlattices. Starting with …
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An investigation of shear response of composite material systems
… Conventional strain gage measurements and the moiré interferometry technique are employed to obtain information of actual deformation of the specimen. Based on the contour maps of displacement obtained from moiré tests, the localized hybrid method is used to quantify the magnitude and scale of …
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Twist angle physics in graphene based van der Waals heterostructures
… hybridized. Additionally, a new long-range moiré phenomenon emerges, and we study the effects of the interplay between moiré physics and interlayer interactions on its transport properties.
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