Tunnelling and switching phenomena in superconducting quantum dots and Josephson junctions
thesisposted on 2018-07-06, 10:46 authored by Dmitry R. Gulevich
This work is devoted to investigation of tunnelling and switching phenomena arising in Condensed Matter Physics. In the first part I investigate quantum tunnelling of a single Abrikosov vortex in a superconducting quantum dot. The escape of a vortex carrying magnetic flux leads to a switching of a quantum dot to non-magnetic state. Tunnelling of a vortex manifests itself as a spontaneous relaxation of magnetization. I showed that it is possible to use an instanton technique based on path integral formalism even in presence of forces breaking time-reversal symmetry. [Continues.]
Loughborough University (research studentship). European Physical Society (European Mobility Scheme for Physics Students, EMSPS). Committee of Vice-Chancellors and Principals of the Universities of the United Kingdom (Overseas Research Studentship, ORS). European Science Foundation.
Publisher© D.R. Gulevich
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesA Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.