Three dimensional (3D) Dirac semimetals are 3D analogue of graphene, which display Dirac points with linear dispersion in k-space, stabilized by crystal symmetry. Cd3As2 and Na3Bi were predicted to be 3D Dirac semimetals and were subsequently demonstrated by angle-resolved photoemission spectroscopy. As unveiled by transport measurements, several exotic phases, such as Weyl semimetals, topological insulators, and topological superconductors, can be deduced by breaking time reversal or inversion symmetry. This project, a facile and scalable chemical vapor deposition method will be developed to fabricate high-quality Dirac semimetal Cd3As2 microbelts. Their ultrahigh mobility and pronounced Shubnikov-de Haas oscillations will be investigated. This research opens a new avenue for the scalable fabrication of Cd3As2 materials towards exciting electronic applications of 3D Dirac semimetals.

Professor Hao Wang

• Professor Hao Wang

• Centre for Future Materials
• School of Engineering

• Electrical and Electronic Engineering
• Materials Engineering
• Nanotechnology

• Doctor of Philosophy (DPHD)