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 23 for “"g-factor"”.
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Sun polarised dynamics in quantum wells
… electron, hole and excitonic effective Lande g-factors have been measured as a function of quantum well thickness in GaAs/Al0.36Ga0.64As and In0.11Ga0.89As/GaAs. For the GaAs/AlGaAs wells, we observed a change in sign of the exciton g-factor and using k.p perturbation theory to model the form of …
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g-factors for ternary crystals of groups iii and v
… is to present a method of calculating the g-factors of ternary crystals of III-V group elements. There is an increasing interest in knowing the magnetic behavior of different semiconductor materials, due to advances in the domain of spintronics. The g-factors were calculated for the …
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ION TRAP SYSTEM TOWARDS 176LU+ 3D2 CLOCK TRANSITION
… an evaluation of 3D2 systematics and the 3D2 g-factor measurements with a relative inaccuracy of 10-7. The g-factor results are used to extract the residual quadrupole moment of the 3D2 state arising from hyperfine-mediated effects, corresponding to a frequency shift at the low 10-19 level.
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Molecular Dynamics and Spin-Spin Interactions in Complex Systems: High Field and Multifrequency EPR Approach
… Variations in the width and apparent g-factor of the Gd$\sp{3+}$ EPR spectra with the microenvironment observed at high fields are interpreted as changes in the zero field splitting of the complex. This argument is supported by multifrequency EPR data from 9 to 249 GHz.
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Spin effects in single-electron transistors
… Zeeman splitting according to their spin. The g-factor describing this splitting is extracted in the spin-flip inelastic cotunneling regime. The Kondo splitting is linear and slightly greater than the Zeeman splitting. At zero magnetic field, the spin triplet excited state energy and its …
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Tuning the coherent electron-nuclear interaction in a semiconductor quantum dot
… mediated by an anisotropy of the electron g-factor. The first part of this work develops the infrastructure needed to explore the physics of the electron and nuclear spins in the latter part of the work. This begins with a review of the physics relevant to control of the electron spin hosted …
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Time Resolved Spectroscopy in InAs and InSb based Narrow-Gap Semiconductors
… features (such as small effective mass, large g-factor etc). Our time resolved techniques demonstrated tunability of carrier and spin dynamics which might be important for charge and spin based devices. The samples studied in this work were provided by the groups of Prof. Wessels (Northwestern …
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Quantum Monte Carlo: Applications of the Twist -Averaged Boundary Conditions and the Calculation of Forces
… densities and determined the effective Lande g factor. At the experimental equilibrium density of liquid 3He, we computed the spin polarization energy and found the unpolarized state is stable, in agreement with experiments. We also studied the electronic energy in a slab geometry using both …
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Quantum Monte Carlo: Applications of the Twist-averaged Boundary Conditions and the Calculation of Forces
… densities and determined the effective Lande g factor. At the experimental equilibrium density of liquid 3He, we computed the spin polarization energy and found the unpolarized state is stable, in agreement with experiments. We also studied the electronic energy in a slab geometry using both …
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A quantum Monte Carlo study of the two-dimensional electron gas
… such as the effective mass and Lande g factor of the two-dimensional electron gas, which are compared with previous analytic calculations. Finally, the validity of our fixed-node calculations for the ground state and variational ones for the excitations is tested by transient-estimate …
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An examination of the Wechsler Adult Intelligence Scale (WAIS) subtests from a neuopsychological perspective
… that language skills, an auditory attention factor, and a general intellective factor were being tapped (Dean, 1985a).A canonical correlation was computed. The results yielded one significant correlation between the linear components of the WAIS and the HRNB tests. Only canonical variates …
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Bandstructure calculations for holes in GaAs and simulations of dc conductance in electron quantum point contacts
… of different methods of obtaining the Landè g-factor g* from QPC conductance measurements. We simulated data for a parabolic QPC saddle-point potential at T=0 K and analyse the data using methods based on the AC conductance and on the DC conductance. We show that the two methods are compatible …
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Resonance fluorescence of novel quantum emitters
… polarizability, diamagnetic coefficient, and g-factor of excitons localized within them are measured. Temporal measurements on neutral and charged exci- tons are performed, and a bi-exponential decay is observed in the former case, which necessitates a spin-flip interaction with the Fermi sea. RF …
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One- and two-qubit operations in Si-MOS quantum dots
… supercomputers are not capable of, such as prime factoring, database search, and quantum simulation. Quantum bits, or qubits, made from silicon quantum dots is one scalable approach that can be used to realize a quantum computer. Even though the essential ingredients for this platform have been …
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Spin Properties of Heavy Holes in Low-Dimensional Quantum Electronic Devices
… of the anisotropy of the in-plane 1D hole g-factor on GaAs cubic crystal anisotropies, and are able to probe the structure of the SOI to extract new information about previously unknown terms in the Hamiltonian for 1D holes. We also present preliminary Zeeman spin-splitting measurements of 1D …
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Using multiplexers to study the statistics of quantum phenomenon in one-dimensional wires
… we realise measurements of the effective g factor ($g^*$) and high-field offset ($\Delta E^{hfo}$) in numerous devices in a single cooldown at T=40 mK. The statistical results show both the $g^*$ and $\Delta E^{hfo}$ increase with the potential confinement, which supports the predictions …
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Interaction and Mixing Effects in Two and One Dimensional Hole Systems
… indicate that Landau levels at even filling factors will not cross. For high filling factor, this is attributed to a spin-orbit mixing effect which arises from the low symmetry of the system. At lower filling factor, activation-energy measurements verify that the energy gaps decrease and then …
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Spin and Carrier Relaxation Dynamics in InAsP Ternary Alloys, the Spin-orbit-split Hole Bands in Ferromagnetic InMnSb and InMnAs, and Reflectrometry Measurements of Valent Doped Barium Titanate
… were the ternary alloys InAsP. The electron g-factor of InAsP can be tuned, even allowing for g=0, making InAsP an ideal candidate for quantum communication devices. Furthermore, InAsP shows promises for opto-electronics and spintronics, where the development of devices requires extensive …
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Tight-binding simulations of random alloy and strong spin-orbit effects in InAs/GaBiAs quantum dot molecules
… spin-mixing and increase resonance change in g-factor results in intra-dot spin-mixing between Zeeman split states of the lower energy dot. A perturbative analysis of the magnetic field shows that both the spin-mixing and resonance g-factor change are effects of the Peierls contribution, or the …
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