Science Daily October 30, 2021
Strain engineering is a powerful tool in designing artificial platforms for high-temperature excitonic quantum devices. An international team of researchers (USA – City College of New York, Germany, Japan)Â has created excitonic wires, essentially one-dimensional channels for excitons in what is otherwise a two-dimensional semiconductor by depositing the atomically thin 2D crystal on top of a microscopically small wire they created a small, elongated dent in the two-dimensional material, slightly pulling apart the atoms in the two-dimensional crystal and inducing strain in the material. For excitons, this dent is much like a pipe and once trapped inside they move along realizing quasi one-dimensional transport of excitons. Exciton transport properties in a 2D material with effectively tunable dimensionality has broad implications for both basic solid-state science and emerging technologies…read more. Open Access TECHNICAL ARTICLE
2D imaging of the transient exciton distribution at T = 4 K… Credit: SCIENCE ADVANCES, 29 Oct 2021, Vol 7, Issue 44Â