Doctor of Philosophy
School of Physics
In this thesis, we examine five main transport properties: nonlinear optical conductivity, self-focusing, thermionic conductivity, photogalvanic conductivity and magneto-optical conductivity across a number of topological materials. In the case of Weyl, Dirac and gapped semimetals as well as the α-T3 model, minimal coupling Hamiltonia are able to capture multiple topological phases through the same equation. This allows us to survey nonlinear optical conductivity, self-focusing and thermionic conductivity for the nodal semimetals whilst only nonlinear conductivity is studied for the α-T3 lattice. Shift current generation and circularly polarised photogalvanic conductivity are uncovered for a symmetry broken nodal ring material whilst twisted bilayer graphene is the system in which we study both nonlinear and magneto-optical conductivity.
Zuber, Jack William, QUANTUM TRANSPORT IN TOPOLOGICAL MATERIALS, Doctor of Philosophy thesis, School of Physics, University of Wollongong, 2021. https://ro.uow.edu.au/theses1/1107
Unless otherwise indicated, the views expressed in this thesis are those of the author and do not necessarily represent the views of the University of Wollongong.