UL Institute of Chemical Physics presents the latest research on topological insulators

On June 27, on the first day of the 5th World Congress of Latvian Scientists, a visit was held to the Academic Centre of the University of Latvia, where all the visitors and potential collaborators had the opportunity to learn more about ongoing fundamental research on topological insulators, including the growth and potential use of topological insulator material tungsten ditelluride WTe2.

WTe₂ is a promising material towards fabrication of energy-efficient electronic devices due to its inherent two-dimensional topological insulator (2D TI) properties.

Theoretical studies indicate that the transport of charge carriers in a certain configuration of this material takes place along the edges of the sample and is protected against back-scattering, but experimentally it is challenging to isolate it unequivocally, because of the material quality and rapid degradation in ambient conditions.

The WTe₂ structures obtained within the project "Topological semimetals towards low-dissipation electronics" (lzp-2021/1-0302) - nanowires, single or multi-layer films, thin structures and particularly heterostructures with hexagonal boron nitride are of improved quality due to pristine WTe₂/hBN interfaces and are currently being integrated in devices for further research to controllably access and isolate transport via edge states.

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