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 37 for “"spin-orbit interaction"”.
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Introducing spin-orbit interaction in graphene
… it central to modern nanoscience. However, the spin-orbit interaction (SOI) naturally present in graphene is extremely weak and has yet to be observed experimentally. This presents an obstacle for accessing novel phenomena in transport and optics, in particular those related to topological …
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Study of the effect of spin-orbit interaction in solids
Jedním z důsledků spin-orbitální interakce v pevných látkách je anomální Hallův jev. V této práci popíšeme procesy vedoucí ke vzniku anomálního Hallova jevu a jeho význam ve fyzice pevných látek. Uvedeme formalismus lineární odezvy a další nástroje nutné pro provádění výpočtů anomální Hallovy …
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Spin Properties of Heavy Holes in Low-Dimensional Quantum Electronic Devices
The rich spin physics in quantum confined holes has attracted significant ongoing research interest for over 20 years. The ability to manipulate the spin degrees of freedom in spin-orbit coupled holes via an electric field has opened up the field of spin-based electronics, or spintronics. In this …
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Spin States in Bismuth and Its Surfaces: Hyperfine Interaction
The hyperfine interaction between carrier spins and nuclear spins is an important component in exploring spin-dependent properties in materials with strong spin orbit interaction.However hyperfine interaction has been less studied in bismuth (Bi), a heavy element exhibiting a strong Rashba-like …
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Spin-orbit or Aharonov-Casher edge states in semiconductor systems
… Aharonov-Casher vector potential or Rashba-type spin-orbit interaction using quantum transport in InGaAs/InAlAs herterostructures. The Aharonov-Casher effect is electromagnetically dual to the Aharonov-Bohm effect and is predicted to lead to edge states in a parabolic confinement at …
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Methods for Accurately Modeling Complex Materials
… treatment of band gaps in semiconductors, spin density functional theory with the inclusion of spin-orbit interaction to model nanomagnetic systems, and novel empirical potentials that reproduce ab-initio data at a fraction of the computational cost. We also present a new global …
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Optical studies of current-induced spin-orbit effects in magnetic systems
… of magnetic moments is essential for future spintronics applications, in which the intrinsic spin of the electron is utilized in addition to the electron charge for data processing and storage. Spin-orbit-interaction-induced phenomena, including the spin Hall effect, Rashba-Edelstein effect …
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Quantum-coherent transport in low-dimensional mesoscopic structures and thin films
… in the field of quantum technologies and spintronics. Various mesoscopic structures, namely quantum stadia, quantum wires, and side-gated rings, were fabricated to function as quantum interference devices and platforms to study quantum coherence on two-dimensional electron systems in …
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Entanglement and quantum gate processes in the one-dimensional quantum harmonic oscillator
… analytically and numerically for a variety of interaction potentials. When the two qubits are initially in the same state, no entanglement is generated as there is no direct qubit-qubit interaction. Therefore, for an arbitrary initial state, this process implements a root-of-swap entangling …
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Spin-flip scattering of conduction electrons from impurities
… of experiment, the effect of impurities on the spin orientation lifetime of conduction electrons. We have made a theoretical and experimental study of the effect of non-magnetic elemental impurities on the conduction electron spin resonance (CESR) in metals. By measuring the concentration …
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Quantum State Singlet-Triplet Character Control in 7Li2
… by all-optical control of valence electron spin polarization in the lithium dimer. The energy levels of interest are two closely spaced rovibrational levels (the G1Πg (12, 21f) and 13Sg- (1, 21f) states separated by 720 MHz). In the absence of any optical fields, the spin-orbit interaction …
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Experimental Observation of Geometric Phases in Narrow-Gap Semiconductor Heterostructures
… of delicate quantum phases; and the strong spin-orbit interaction (SOI) in the systems gives us means by which we can manipulate the quantum-mechanical spin of these electrons through the orbital properties of the electrons. This enables the observation of spin-dependent phenomena otherwise …
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Topics in the theory of semiconductors
… are analyzed using the tight-binding model with spin-orbit interaction. The density of states and the band gap at the L point are computed for both the effective medium using the virtual crystal approximation and the realistic medium employing the recursion method, and the results are compared. …
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THE SPINTERFACE PROBLEM: AB-INITIO STUDIES OF FE-PHTHLOCYANINE ON TRANTITION-METAL OXIDES.
… characterize what is commonly called an organic spinterface. The central idea of our study is the possibility of exciting a spin coherent wave inside the substrate through a light-induced excitation of the molecule - in other words, actively perturbing the spinterface to modify its magnetic …
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Effects of asymmetry on electron spin dynamics in gallium arsenide quantum wells
This work presents optical studies of electron spin dynamics in gallium arsenide (GaAs) quantum wells, focusing on the effect of inversion asymmetric confinement potentials on spin lifetimes in quantum wells grown on (110)-oriented substrates. Inversion asymmetry in the presence of the spin orbit …
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Many-body contributions to spin relaxation in semiconductors
Spintronics has the potential to play a significant role in future electronic devices. The success of the field hinges on our ability to maintain and propagate spin signals over various length scales and periods of time. Common to all devices designed to carry spin signals is a need to hold the …
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Effect of applied fields on the optical properties of color centers
… The analysis is restricted to centers with orbital singlet ground states.. It is especially applicable to centers with orbitally degenerate excited states which are interacting strongly with the lattice» such as the F center in the alkali halides.. The changes in the optical properties are …
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Manipulation of spin textures by unconventional spin torques
… high-performance, low-power solid-state spintronic devices. The manipulation of nonuniform magnetization textures such as domain walls and skyrmions provide both a means to control magnetism in devices, and to gain new fundamental insights into spin-charge and spin-orbital interactions in …
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Time-Resolved Studies of Magnetic and Non-Magnetic Narrow-Gap Semiconductors
In recent years, spin relaxation, injection, and manipulation in semiconductors have attracted considerable interest because of several potential applications in "spintronic" devices and the necessity to understand and control spin-based phenomena. In light of the growing interest in spin-related …
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