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Showing 1 to 18 of 18 for “"hyperfine interaction"”.
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Hyperfine Interaction of the Group IV Color Centers
… in previous works, a detailed theory of the hyperfine coupling to the nuclear spin is lacking. This work presents a complete theoretical model of the hyperfine coupling to the intrinsic dopant nucleus in the group IV-negative color centers, complete with ab-initio theoretical predictions of …
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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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The Effect of The Structure of The Proton on The Hyperfine Interaction Inhydrogen
Made available in DSpace on 2015-05-12T17:11:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0010522.PDF: 3968830 bytes, checksum: 0fe8dfebeb8548da12a90e97a49c90ef (MD5) Previous issue date: 1954
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Nuclear magnetic resonance in single crystals of the dilute magnetic alloys: CuFe, CuCo, and CuNi
… well as to measure in detail the strength of the interactions responsible for the anisotropic field shifts. This data yielded positive identification of satellite resonances from the following neighboring shells of nuclei around the 3-d transition element impurity: CuFe, second and third; CuCo, …
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Muonium in C₆₀ fullerites : studies of structural and electronic properties
… while the other is endohedral muonium with a hyperfine parameter Aμ, close to that of muonium in vacuum. The signal from the muonium-C₆₀ radical -- which is characterized by a small Aμ, (10% of Avacμ) and an anisotropic hyperfine interaction -- is sensitive to the molecular dynamics and is …
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Lowest Q² measurement of the [gamma] *p [right arrow] [Delta] reaction : probing the pionic contribution
… symmetry. The quark models using the color hyperfine interaction underestimate the size of the quadrupole terms by more than an order of magnitude. Models using the pion cloud do a much better job of describing the data. This is expected due to the spontaneous breaking of chiral symmetry …
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Non-equilibrium spin accumulation in Co2FeMnSi/n-GaAs heterostructures
… which is dynamically generated via flip-flop interactions with the spin-polarized electrons. Chapter 1 covers the theoretical framework which we use to electrically study the injection and detection of electron spins into GaAs. This framework includes two relevant mechanisms for injection and …
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Development of first principles paramagnetic NMR methodologies to probe the complex local structural properties of Li-ion battery materials
… very challenging. This is primarily due to the interactions of the unpaired electrons with the NMR observed nucleus, and the interpretation of the NMR spectra often requires the aid of reliable theoretical and computational methods. Often the dominant interaction contributing to the measured …
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Microscopic Theory of the Knight Shift
… B}_1(t)$ and with each other via an anisotropic hyperfine interaction. An Anderson-like Hamiltonian describes the excitations of the relevant occupied local orbital electrons into the conduction bands, each described by an anisotropic effective mass with corresponding Landau orbits and an …
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Coherence and state engineering of an optically active central spin system
… QD and subsequently used to refocus the strong hyperfine interaction between the spin and the nuclear ensemble. The measurement demonstrates a nearly hundred-fold improvement of the electron spin coherence over the state of the art in the conventional InGaAs QDs. This is owed to the reduced …
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Engineering coherent control of quantum information in spin systems
… systems and incorporating electron spins. If the hyperfine interaction has an anisotropic character, it is proven that the composite system of one electron and N nuclear spins (le-Nn) is completely controllable by addressing only to the electron spin. This 'electron spin actuator' allows for …
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The silicon-vacancy centre in diamond for quantum information processing
… methods while displaying a rich physics due to interactions with their solid-state environment. Such properties have made them an advantageous building block for quantum information processing, in particular to construct a quantum network, where information would be encoded in spins and …
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Environmental coupling in a quantum dot as a resource for quantum optics and spin control
… to an effective magnetic field created by the hyperfine interaction, the Overhauser field. This fluctuating effective field lifts the electron spin degeneracy in the absence of a magnetic field, and dictates the optical selection rules of the trion system. These spectra therefore allow for a …
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Exploring single hole states in InAs/GaAs quantum dots and quantum dot molecules under 2-D electric fields
… 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 inhibit the scalability of a hole-spin-based quantum information platform. A deeper understanding …
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Quantum sensing and simulation with solid-state defects
… to refocus the dominant noise in the intrinsic hyperfine interaction and quadrupole terms, which extends the dephasing time of a large spin ensemble to the single spin limit. In sensing stochastic signals, we develop a digital noise spectroscopy approach based on Walsh dynamical decoupling …
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Spin Polarized Transport in Nanoscale Devices
… quantum wells and wires) is dominated by nuclear hyperfine interaction, which weakens progressively with temperature. We hope that our work, which elaborates on all of the above mentioned topics in great detail, will be a significant contribution towards the current state of knowledge of subtle …
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Approaching magnetic field effects in biology using the radical pair mechanism
… is affected by nearby nuclear spins via the hyperfine interaction, by applied magnetic fields via the Zeeman effect, and by each other via the exchange and dipole interactions. The spin motion varies in singlet/triplet character, and if the chemical reaction is more (or less) favorable in a …