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 251 for “"Insulators"”.
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Interaction effects in topological insulators
… shortrange interaction effects in topological insulators. We start with the Kane-Mele model on the decorated honeycomb lattice and study the stability of topological insulator phase against different perturbations. We establish an adiabatic connection between a noninteracting topological …
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Topological Insulators Interfaced with Trivial and Ferromagnetic Insulators. Selective contact and patterning of surface states.
Topological insulators (TIs) are a novel class of material which host helical surface states with exciting and unique electronic properties. They can provide insights into new physics and also pave the way for potential spintronic applications. Much work has been done to identify and characterise …
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Secondary Electron Emission of Liquid Insulators
Made available in DSpace on 2014-12-08T22:24:45Z (GMT). No. of bitstreams: 1 7013299.pdf: 2113801 bytes, checksum: 73ae609c90132eab607f6518c534e29f (MD5) Previous issue date: 1969
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Quantum transport in magnetic topological insulators
This thesis is focused on the study of carrier transport behaviour in magnetically doped topological insulator (TI) materials. Magnetic TIs have been predicted to possess many exotic properties, such as the quantum anomalous Hall (QAH) effect, in which the edge states propagate adiabatically, …
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Metal-insulator transitions in Mott insulators.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Physics.
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Probing the topology in band insulators
… produces measurable consequences in periodic insulators. We first warm up by investigating the charge conjugation invariant insulator in one spatial dimension. We show there are two topological distinct classes and derive an integral formula for the topological index that distinguishes between …
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Mechanisms of flashover of contaminated insulators.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1974. Sc.D.
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Theory of topological insulators and its applications
… types are in use: 1) Metals 2) Semiconductors 3) Insulators. All the three material types are classified according to the energy gap between conduction and valence bands derived from band theory of solids. Recent theoretical predictions and confirmed by experimental observations have provided …
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Picosecond Spin Seebeck Effect in Magnetic Insulators
The spin Seebeck effect (SSE) refers to spin current generation in a magnetic insulator/non-magnetic metal heterostructure due to a thermal gradient and most SSE experiments typically use an electric current as heat source. This study uses Terahertz (THz) time-domain emission spectroscopy where a …
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Particle contamination of high voltage DC insulators.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Investigation of magnetic interactions in topological insulators
Topological insulators are a category of phases in condensed matter with inverted conduction and valence bands, which is protected by time reversal symmetry. As a result, the bulk keeps insulating while the surface supports an exotic high-mobility spin-polarized electronic states. Introducing …
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Local excitons in insulators and impurity doped metals
The local exciton spectra of some alkali-halide insulators and impurity doped lithium metal are calculated using atomic clusters to simulate the bulk solid. The calculations are ab initio and use unrestricted Hartree-Fock and second order many body perturbation techniques. Accurate results are …
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Crystalline-electromagnetic responses of topological semimetals and insulators
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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A photoelectric investigation of surface states on insulators
Thesis (Ph.D.) Massachusetts Institute of Technology. Dept. of Physics, 1953.
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The electrical strength of insulators in high vacua
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1935
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Quantum electronic transport in atomically layered topological insulators
… matter, beginning with the notion of topological insulators (TIs) for electronic systems. For the time-reversal invariant TIs, a key aspect is the "helical" mode at the boundary of the system - that is, the ID edge of a 2D topological insulator or the 2D surface of a 3D topological insulator. …
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Transport properties in the vicinity of Mott insulators
Understanding the states in the vicinity of the Mott insulator is crucial to understanding both the physics of the transition between a Mott insulating phase and a metallic phase and the physics of the cuprate high-temperature superconductors. In this thesis, we start from the standard Mott …
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On Exponentially Localized Wannier Functions in Non-Periodic Insulators
… the door for extending the theory of topological insulators, a recently discovered class of materials, to fully non-periodic systems.</p>
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Design of Improved Polyester Dielectric Insulators for Electronic Packaging
First, the foaming methods used to lower the dielectric constant of the copolyester thermoset to 2.5 $\rm (25\sp\circ C,$ 1 kHz) are described. Second, the nature of the increase in melting temperature of the liquid crystalline copolyesters upon annealing near their original melting temperature to …
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