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 68 for “"Quantum Transport"”.
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QUANTUM TRANSPORT WITH COLD ATOMS
… poses a powerful platform to study the transport of quantum matter. The interaction between atoms, the type of atoms and their confinement can be designed to simulate quantum transport phenomena that are often difficult to realize within solid state devices. Recent advances in …
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Electronic Quantum Transport in Graphene.
… successful application of epitaxial graphene in quantum resistance metrology and to describe the effect of bilayer patches on the resistance quantization. Finally, we study how the ordering of adatoms on top of mechanically exfoliated graphene due to RKKY interaction affects the transport …
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Quantum transport in graphene heterostructures
… This thesis describes low temperature transport experiments designed to probe the consequences of this basic fact. The first part concerns the effect of the lattice pseudospin, an analog of a relativistic electron spin, on the scattering properties of mono- and bilayer graphene. We …
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Quantum transport in gapped graphene
… focuses on investigating local and nonlocal transport properties in hexagonal boron nitride (hBN)/graphene superlattice Hall bars and graphene Hall bars proximity coupled to the ferrimagnetic insulator yttrium iron garnet ($\text{Y}_{3}\text{Fe}_{5}\text{O}_{12}$ or YIG). The first part …
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Quantum transport in Josephson junctions
… current will flow between them. To study this transport we utilise the techniques of non-equilibrium Green’s functions; capable of probing the interplay between coherent quantum effects over macroscopic distances. We begin by broadly discussing the quantum mechanical techniques required in this …
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Quantum transport in graphene nanotransistors
… edge geometry determines its electronic transport properties, and the rich behavior of conductance of nanoribbons in response to external potentials makes them ideal for use within transistors. In this thesis, we work towards creating an accurate model of graphene nanoribbon transistors, …
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Quantum Transport Experiments with Ultracold Atoms
Quantum simulation is a burgeoning field of research, in which quantum systems are engineered to behave similarly to external, complex systems of interest. These quantum simulators are an alternative to the elusive all-purpose ‘quantum computer’ and instead function as analogue computers, allowing …
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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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Quantum Transport of Electronic Excitations through Macromolecules
… of real-time dynamics of charged and neutral quantum excitation propagating through macromolecular systems is receiving growing attention due to its potentially countless applications in nano-scale (opto-)electronics and in biophysics. Several key issues have not been fully clarified yet, …
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Quantum transport through conjugated organic molecular junctions
Understanding the electronic transport properties of junctions consisting of a scattering region such as a nanoscale object or molecule connected to electrodes is the central basis for future nano and molecular scale applications. In this thesis, I shall discuss the theoretical methods needed to …
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Quantum Transport in Topological Phases of Matter
… Among the ways of studying such materials, quantum transport methods prove to be of particular importance. In this thesis, I touch upon many aspects of quantum transport in topological materials. First, I introduce a novel type of Hall effect, called Magnus Hall effect, that allows one to …
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Quantum transport of electrons through graphene and carbon nanotubes
Quantum transport of electrons through graphene has attracted increased interest in the field of nano-technology. Quantum transport through mesoscopic systems explains a wide range of interesting experimental findings, such as: rectification, switching mechanism and transistor actions. We focused …
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Quantum transport and bulk calculations for graphene-based devices
… to capture the richness of the confinement and transport physics in quantum-wire devices. I developed an efficient fully three dimensional atomistic quantum transport simulator within a nearest-neighbor atomistic tight-binding framework. However, I soon adapted this work to the study of …
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Giant Magnetoresistance and Quantum Transport in Magnetic Hybrid Nanostructures.
… a very general numerical technique to compute transport properties of heterogeneous systems, which can be used together with accurate spd tight-binding Hamiltonians or simpler models. I will then apply this technique to several transport problems in the mesoscopic regime. Firstly I will review …
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Quantum Transport and Scale Invariance in Expanding Fermi Gases
<p>This dissertation describes the first experimental measurement of the energy and interaction dependent shear viscosity $\eta$ and bulk viscosity $\zeta$ in the hydrodynamic expansion of a two-component Fermi gas near a broad collisional (Feshbach) resonance. This expansion also provides a …
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High temperature quantum transport in graphene/hexagonal-boron nitride heterostructures
… This has enabled the study of a plethora of transport phenomena, as well as the realisation of novel device architectures that will be used in the next generation electronics. In general, experimental signatures of electron transport are most prominent at liquid helium temperatures when …
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