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.
Results
Showing 1 to 20 of 33 for “"Spin Hall Effect"”.
-
Applications of Quantum Measurement Techniques: Counterfactual Quantum Computation, Spin Hall Effect of Light, and Atomic-Vapor-Based Photon Detectors
Our approach to ultra-high-efficiency photon detection develops and extends a recent novel non-solid-state scheme for photo-detection based on atomic vapors. This approach is in principle capable of resolving the number of photons in a pulse, can be extended to non-destructive detection of photons, …
-
Applications of quantum measurement techniques: counterfactual quantum computation, spin hall effect of light, and atomic-vapor-based photon detectors
… topics: Counterfactual quantum computation, the spin Hall effect of light, and ultra-high-efficiency photon detectors based on atomic vapors. Counterfactual computation entails obtaining answers from a quantum computer without actually running it, and is accomplished by preparing the computer as …
-
Electrical control of spin dynamics in spin-orbit coupled ferromagnets
… In materials with broken inversion symmetry and spin-orbit coupling, electrical current can exert a torque on a local magnetisation. In the studies presented here, a microwave current-induced ferromagnetic resonance (spin-orbit FMR) technique is used to characterise the dynamical magnetic …
-
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 …
-
SPIN CIRCUIT REPRESENTATION OF ELECTRONIC TRANSPORT IN MATERIALS WITH SPIN ORBIT COUPLING
… involve materials and phenomena featuring both spin and charge transport. SPICE compatible spin circuits with 4-component voltage and current (1 for charge and 3 for spin) have been developed to represent this emerging class of devices. However there has not been much work on circuit …
-
Injection, transport and detection of spin currents in organic semiconductors
Research on spin current transport has so far been concentrated around metals, ferromagnetic insulators and inorganic semiconductors, but is still relatively scarce in organic semiconductors. Recently, there have been a few attempts at exploring spin pumping into polymers, which showed promising …
-
Some Topological Aspects of Condensed Matter Physics
… pair. The problem is also studied using an effective Action approach. Edge currents in a quantum spin Hall model in graphene are also studied using similar techniques. A model for the integer quantum Hall effect on a square lattice is presented. Using techniques from algebraic topology, a …
-
Spin-orbit coupled Bose gases
… gauge fields with ultracold atoms, including spin-dependent gauge fields, such as spin-orbit coupling. Motivated by this goal our lab explored several approaches to generate a one-dimensional spinorbit coupling interaction, which has a rich phase diagram and plays an important role for …
-
Control of Light-Matter Interactions via Nanostructured Photonic Materials
… and electrons in a plasmonic film via the spin Hall effect of light. The second method focuses on nanometer scale manipulations of material systems to fundamentally alter the electronic properties of the material and thus significantly change its optical response. This is accomplished via …
-
Probing the Behaviour of Antiferromagnets: Electric and Magnetic Measurements Across a Range of Length-scales
The spin Hall effect (SHE) describes the generation of a spin current orthogonal to an applied charge current within a heavy metal, whilst the spin Seebeck effect (SSE) refers to the generation of a spin current due to thermal gradients within a magnetic material. Both effects have attracted …
-
The Interplay of Spin, Charge, and Heat: From Metal/Insulator Heterostructures to Perovskite Bilayers
… begin with an investigation of non-local spin transport in an amorphous germanium (a-Ge) sample via the inverse spin Hall effect (ISHE). In that study we show that commonly used techniques such as differential conductance and delta mode of a paired Keithley 6221/2182a for non-local …
-
Electrical Manipulation of Spin Dynamics in Ferromagnetic Multi-layers
This thesis explores spin-detection in ferromagnetic materials via two different mechanisms that drive the ferromagnetic resonance – the charge-spin conversion via inverse spin-Hall effect induced by an external charge current and the photon-magnon coupling between ferromagnetic structures and …
-
Linear and nonlinear optical processes in GaAs semiconductor microcavities
… the observation of the all optical spin Hall effect, the separation of spin polarised carriers in real and momentum space, in a pure photonic cavity is included in this thesis. Experimental findings suggest that the excitonic contribution in similar observations in the strong …
-
Conservation Laws and Electromagnetic Interactions
… laws that can manifest themselves as mechanical effects acting on both matter and light waves. This interaction permits remote, precise, and noninvasive manipulation and sensing at microscopic levels. In this dissertation, we demonstrated for the first time a complete set of opto-mechanical …
-
Towards building a prototype spin-logic device
… storage. In particular, the discovery of Spin-Transfer Torque (STT) has allowed information to be written to individual magnets using spin-currents. This has replaced the more traditional Oersted-field control used in field-MRAMs and allowed further scaling of magnetic-memories. A less …
-
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 …
-
Magnetic domain walls driven by interfacial phenomena
… magnetized multilayer films with strong spin-orbit coupling. In particular, extraordinary current-driven domain-wall motion has been observed in atomically-thin ferromagnets sandwiched between a nonmagnetic heavy metal and an insulator. Through experimental studies on various sputtered …
-
Heat, Charge and Spin Transport of Thin Film Nanostructures
… nanostructures is crucial for application in spintronic, spin caloritronics and thermoelectric applications. Much of the difficulty in the understanding stems from the measurement itself. In this dissertation I present our thermal isolation platform that is primarily used for detection of …
-
Electrical injection and detection of spin polarization in InSb/ferromagnet nanostructures
We present studies of the electical detection of spin injection and transport in InSb/CoFe heterostructures. As a narrow gap semiconductor, InSb has a high mobility and strong spin-orbit interaction. Using ferromagnetic CoFe, lateral InSb/CoFe devices are fabricated by semiconductor processing …
-
BOOLEAN AND BRAIN-INSPIRED COMPUTING USING SPIN-TRANSFER TORQUE DEVICES
Several completely new approaches (such as spintronic, carbon nanotube, graphene, TFETs, etc.) to information processing and data storage technologies are emerging to address the time frame beyond current Complementary Metal-Oxide-Semiconductor (CMOS) roadmap. The high speed magnetization switching …
Page 1 of 2