Topology in two-dimensional systems

Topology in two-dimensional systems

Beukman, A.J.A.

Kouwenhoven, L.P. (promotor)

Applied Sciences

QN/Quantum Nanoscience

2016-02-19

This thesis includes two research directions both aim to discover a building block for topological quantum computing. First, in Chapter 3, a novel setup is designed, built, and tested, that can electrostatically gate a material without endangering the materials pristine quality. The setup was designed with the goal to reveal non-Abelian quasiparticles in the v=5/2 fractional quantum Hall effect. To stabilize these particles, material quality should be as high as possible. Second, and the larger part of this thesis, is devoted to InAs/GaSb double quantum wells. They are investigated for their possible use in topological quantum bits. Unprecedented material growth allowed us to investigate this material beyond existing (gate) bounds. By interfacing this material with superconducting leads we set the first step towards topological quantum computing in this material. However, we also found topological-like signatures arising from trivial mechanisms.

topology
quantum
nanoscience
inas/gasb
flip chip
quantum spin Hall
topological insulator

https://doi.org/10.4233/uuid:a3abeb8e-226e-46b8-b6c9-cbdc3bb75ec3

978-90-8593-246-8

Institutional Repository

doctoral thesis

(c) 2016 Beukman, A.J.A.