US-Aust colloquium Topological Insulator States in Thin Films of Cadmium Arsenide

Prof. Susanne Stemmer, Materials Research Lab, University of California, Santa Barbara

Over the past decade, the unique properties of topological materials have generated huge excitement in the condensed matter physics community.  Recently, high-quality thin films of cadmium arsenide (Cd₃As₂), a three-dimensional Dirac semimetal in its bulk version, have emerged as a promising platform for the observation of quantum transport phenomena from topological states and the realization of new topological phases.  In this talk, we will first discuss our recent progress in the growth of epitaxial thin films Cd₃As₂ by molecular beam epitaxy.  We will discuss the evolution of the electronic states of thin (001) Cd₃As₂ films as their thickness is scaled. We will discuss how different topological states in these films give rise to distinct features in magnetotransport studies.

Prof. Stemmer’s lab lab focuses on quantum materials, in particular, high-quality thin films and heterostructures of these materials, which we grow by molecular beam epitaxy (MBE). Currently, we are focusing on functional and correlated oxides and topological materials.

This talk is part of an ongoing series of talks by US and Australian researchers presenting novel developments in condensed matter and cold atomic physics, enriching connections between the two physics communities. Co-presented by FLEET, Monash School of Physics and Astronomy, and the Joint Quantum Institute.

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