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 Dephasing"”.
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The silicon-vacancy centre in diamond for quantum information processing
… network, where information would be encoded in spins and transferred between nodes through photons. Among defects in solids, the negatively charged silicon-vacancy centre in diamond (SiV$^{−}$) has attracted attention for its very promising optical properties for such a network. In this thesis, …
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Spin Polarized Transport in Nanoscale Devices
… ultimate goal in the rapidly burgeoning field of spintronics is to realize semiconductor-based devices that utilize the spin degree of freedom of a single charge carrier (electron or hole) or an ensemble of such carriers to achieve novel and/or enhanced device functionalities such as spin based …
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State-selective imaging of single rubidium atoms in a solid neon matrix
The development of single-spin quantum sensors with nanoscale resolution would provide immense utility in the determination of molecular structure, with applications in fields such as biology and chemistry. This dissertation discusses our progress toward using rubidium atoms trapped in solid neon …
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Spin-coherence and -dephasing of donor and free conduction band electrons across the metal-insulator transition in Si:GaAs
… as a magnetization state. The emerging field of Spintronics is trying to combine the world of semiconductor electronics and magnetism to overcome disadvantagesof each part on its own. Furthermore, new phenomena and applications associated with them may arise. Although this dissertation deals only …
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Decoherence and Dynamical Decoupling in Solid-State Spin Qubits
… is a study of the decoherence of a solid-state spin qubit, either that of a localized electron spin or a donor nucleus, caused by a nuclear spin bath relevant to semiconductor quantum computer architectures. In the presence of an external magnetic field and at low temperatures, the dominant …
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Spin Dynamics in a Tunable Heisenberg Magnet Realized with Ultracold Atoms
Spin is the elementary unit of magnetism. The interactions between many spins give a material its magnetic properties. This thesis focusses on one of the simplest magnetic materials: A one-dimensional chain of spins with tunable nearest-neighbor interactions. This system is described by the …
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Decoherence of Transverse Electronic Spin Current in Magnetic Metals
Transport of spin angular momentum (spin currents) in magnetic thin films is important for non-volatile spin-based memory devices and other emerging information technology applications. It is especially important to understand how a spin current propagates across interfaces and how a spin current …
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Spin and Charge Transport in Metallic Ferrimagnets and Disordered Magnetic Oxides
… disordered magnetic oxides for applications in spintronic devices. Due to the antiferromagnetic exchange interaction, ferrimagnetic materials offer the ultrafast dynamics of the antiferromagnetic exchange, with a net magnetization that can be influenced externally. With two, or more, competing …
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Investigating electron transport in chemical vapor deposition graphene nanostructures
… device applications. Second, in order to enhance spin-orbit coupling (SOC) in graphene for spin transport study and spintronics applications, a graphene - transition metal dichalcogenide (TMD) heterostructure is investigated. Phase coherence length is reduced in the heterostructure and a special …
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Time resolved electrical injection of coherent spin packets through a Schottky barrier
… few years, the manipulation of the electron’s spin degree of freedom for information processing was explored in the new field of spintronics. Future spintronic devices rely on the generation of a spin imbalance in a semiconductor. Electrical spin injection from a ferromagnet into a …
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Analytische Näherungsverfahren zur Beschreibung der nuklearen Spin-Dephasierung
Die Dynamik der Kernspindephasierung in lebenden Systemen enhält relevante Informationen über biologisch wichtige Parameter, wie Sauerstoffversorgung, Mikrozirkulation, Diffusion etc.. Ursächlich für die Dephasierung sind Interaktionen des Spins mit fluktuierenden Magnetfeldern. Notwendig sind also …