Ballistic Josephson junctions and vertical tunnelling transistors based on graphene heterostructures

Abstract

This thesis, submitted to The University of Manchester for the degree of Doctor of Philosophy, covers a range of topics related to the research in two-dimensional materials and van der Waals heterostructures under the title: 'Ballistic Josephson junctions and vertical tunnelling transistors based on graphene heterostructures.'In this thesis, we study the transport properties of two different types of graphene devices. The first one is ballistic graphene Josephson junction and the second one is graphene-hexagonal boron nitride-graphene vertical tunnelling transistor.We report on ballistic graphene Josephson junctions with contacts made from type II superconductor, niobium. We observe pronounced Fabry-Pérot oscillations not only in the normal-state resistance but also in the critical current. The proximity effect is mostly suppressed in magnetic fields of B

Date of Award	1 Aug 2017
Original language	English
Awarding Institution	The University of Manchester
Supervisor	Andre Geim (Supervisor) & Artem Mishchenko (Supervisor)