Advances in Topological Thin Films

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, have emerged as a promising platform for the observation of quantum transport phenomena from topological states and the realization of new topological states.  In this talk, we will first discuss our recent progress in the growth of epitaxial thin films Cd₃As₂ by molecular beam epitaxy.  We will then discuss the nature of the topological insulator-like states of thin (001) Cd₃As₂ films and the “half-integer” quantum Hall effect arising from these states.  We will also discuss several measurements relevant for quantum information devices, including electronic interference experiments.

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