Quantum transport and spin-orbit coupling in semiconductor nanostructures
Date
2023
Authors
Whittaker, Tyler Jaben
Editors
Advisors
Tettamanzi, Giuseppe
Rahman, Rajib (UNSW)
Rahman, Rajib (UNSW)
Journal Title
Journal ISSN
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Type:
Thesis
Citation
Statement of Responsibility
Conference Name
Abstract
Semiconductor nanostructures present a promising path to enhance current computing technology and develop quantum information technologies. The electronic structure of these nanostructures has direct implications on the transport of electrons through them and their potential device applications. This thesis explores the electronic structures of various semiconducting nanostructures and their dependence on electromagnetic fields, dopant atoms, spin-orbit coupling and atomistic features through experiment and modelling. A form of quantum transport, known as single electron charging, is demonstrated through the electron-bound states of dopant atoms in a silicon nanostructure. A portion of a recently published work is presented which models the response of valley states in a gate-defined quantum dot within a silicon quantum well to an interface step and applied electric fields. The main work of this thesis employs an atomistic tight-binding model to determine the effective g-factor anisotropy of InAs nanowires under various atomistic and electromagnetic conditions. The spin-orbit interactions present in the nanowires are extracted from the effective g-factor anisotropy with an effective model. The modelling results provide insights for InAs nanowire applications in fields such as Majorana zero mode research, spintronic devices and quantum information technology.
School/Discipline
School of Physics, Chemistry and Earth Sciences
Dissertation Note
Thesis (MPhil) -- University of Adelaide, School of Physics, Chemistry and Earth Sciences, 2023
Provenance
This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals