dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Fritz, L. | |
dc.contributor.author | Minarelli, E. | |
dc.date.accessioned | 2018-02-19T18:01:10Z | |
dc.date.available | 2018-02-19T18:01:10Z | |
dc.date.issued | 2018 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/28636 | |
dc.description.abstract | Recently, there have been studies on p-wave superconductor system designed with a lattice of impurity over its surface. They result in non-trivial topological phases with high-values of Chern Numbers.
The present thesis investigates a similar model starting with a 3D strong Topological Insulator - experimentally established. Focusing on one surface, first we place a ferromagnetic material to create an energy gap on the surface spectrum, then we display a square rarefied lattice of magnetic impurities. That is a two-bands model and we derive for it an effective Hamiltonian. Calculating the Chern Numbers of the in-gap bands structure and studying the surface energy spectrum, we find the setting responds like a Chern Insulator.
Finally, comparing the spectrum energy initial condition of our model to the p-wave superconductor one, we mention the next improvements to eventually reach high-values of Chern Numbers. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 2730628 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Engineering of impurity bands with Chern Numbers | |
dc.type.content | Master Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | Chern Numbers, 3D strong Topological Insulator, impurity bands, impurity lattice | |
dc.subject.courseuu | Theoretical Physics | |