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 11 of 11 for “"Spin-mixing"”.
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Spin-mixing and transport through superconducting interlayers in ferromagnetic Josephson junctions
The creation of spin-polarization in the superconducting state raises possibilities for low-energy logic and memory elements. Supercurrents of spin-aligned triplet Cooper pairs (or ’triplet pairs’) can be generated at magnetically inhomogeneous superconductor/ferromagnet interfaces, and have a …
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Spin-mixing and Interferometry in Microwave-dressed Sodium Spinor Bose-Einstein Condensates
This thesis presents my research on spin-mixing and interferometry in an all-optically generated spinor Bose-Einstein condensate (BEC) of sodium atoms. The sodium atoms are loaded from a magneto-optical trap into a crossed optical dipole trap and are subsequently evaporatively cooled down to …
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Tight-binding simulations of random alloy and strong spin-orbit effects in InAs/GaBiAs quantum dot molecules
… quantum dots (QDs), which have long hole-spin coherence times and are amenable to optical control schemes, have long been explored as building blocks for qubit architectures. One such design consists of vertically stacking two QDs to create a quantum dot molecule (QDM). The two dots can be …
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Magnetic and Spintronic Properties of Rare-Earth Iron Garnets
… anisotropy (PMA), and their potential for spintronic device applications has been studied extensively in recent years. In particular, thulium iron garnet (TmIG) has excited great interest due to record-breaking spin orbit torque-driven domain wall velocities over 2km/s and the presence of …
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Spin Currents in Organic Semiconductors
… recently been found to have a comparably large spin diffusion time and length. This makes them ideal candidates for spintronic devices. However, spin injection, transport and detection properties in organic materials have yet to be fully understood. This work studies spin injection from …
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Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics
This thesis aims to develop materials for spintronic memories and demonstrate growth of iron garnet superlattices with layering at a sub unit cell scale. Iron garnet films are suitable for next generation spintronic memories because of their low Gilbert damping and their growth with perpendicular …
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Exciton Dynamics and Optical Properties of Lead Halide Perovskite Nanocrystals: From Nanorods to Nanocubes
… mechanisms, structural and surface effects, and spin mixing in these novel materials. In the second part of the thesis, I focus on the opposite size regime, where collective behaviour dominates the optical properties. I develop a novel spectroscopy to pinpoint dephasing mechanisms that could …
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Nuclear structure in 16O measured with (e,e´γ) coincident electron scattering
… form factor ratio in the isospin-forbidden transition to the 1- (7.12 MeV) state has crossed zero at very low momentum transfer. This result lends credence to theoretical speculation of a minimum in the longitudinal form factor resulting from iso spin mixing. However the same …
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Measurement and control of exciton spin in organic light emitting devices
… First, a novel method for measuring exciton spin statistics is described and implemented. This method avoids several drawbacks common to existing methods, and shows completely randomized exciton spin statistics in two archetypal organic semiconductors: one that is a small molecule, and …
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Understanding and measuring flow in aortic stenosis with MRI
… loss due to higher order motions, turbulence and spin mixing could all be mitigated by reducing the duration of the velocity sensitivity gradients and shortening the overall echo time (TE). However, improvements in an optimised PC sequence (TE 1:5ms) were not satisfactory. Flow estimates remained …
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Exploring single hole states in InAs/GaAs quantum dots and quantum dot molecules under 2-D electric fields
… and quantum computing. Specifically, hole spins in a single QD/QDM have longer decoherence time than electron spins due to the lack of hyperfine interaction, making hole spins a great qubit candidate. However, many challenges such as QD growth, device integration, and spin manipulation …