Electronic properties of low dimensional carbon materials

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dc.contributor.authorSanders, Kirsty Gail
dc.date.accessioned2017-01-19T07:02:45Z
dc.date.available2017-01-19T07:02:45Z
dc.date.issued2016
dc.descriptionA Dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in ful lment of the requirements for the degree of Master of Science. Johannesburg 2016.en_ZA
dc.description.abstractLow dimensional carbon systems are of immense interest in condensed matter physics due to their exceptional and often startling electric and magnetic properties. In this dissertation we consider two of these materials - graphene and nanocrystalline diamond. The effect of synthesis parameters on the quality of graphene is examined and it is found that controlling the partial pressure of the synthesis gases plays a critical role in determining the quality of the sample. Superconductivity in Boron doped nanocrystalline diamond (B-NCD) is considered and weak localisation along with a Berezinsky-Kosterlitz-Thouless (BKT) transition is identified in the samples. Furthermore we explore theoretically the problem of electric transport through a double quantum dot system coupled to a nanomechanical resonator. We find resonant tunnelling when the difference between the energy levels of the dots equals an integer multiple of the resonator frequency, and that while initially increasing the electron phonon coupling (g) increases the current through the sample further increase in g inhibits electric transport through the quantum dots.en_ZA
dc.description.librarianLG2017en_ZA
dc.format.extentOnline resource (vii, 106 leaves)
dc.identifier.citationSanders, Kirsty Gail (2016) Electronic properties of low dimensional carbon materials, University of Witwatersrand, Johannesburg, <http://wiredspace.wits.ac.za/handle/10539/21681>
dc.identifier.urihttp://hdl.handle.net/10539/21681
dc.language.isoenen_ZA
dc.subject.lcshLow-dimensional semiconductors
dc.subject.lcshGraphene
dc.subject.lcshSemiconductor nanocrystals
dc.subject.lcshCarbon
dc.titleElectronic properties of low dimensional carbon materialsen_ZA
dc.typeThesisen_ZA
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