Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Electronic structure of surfaces: Spectroscopy, surface states – Poster

O 42.3: Poster

Dienstag, 10. März 2026, 14:00–16:00, P2

WTe2: a Cool Look at 330 mK — •Rian A.M. Ligthart, Kevin Hauser, Alexander LaFleur, Gleb Neplyakh, and Fabian D. Natterer — Department of Physics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland

As silicon-based electronics reach their size limit, two-dimensional (2D) materials, particularly Transition Metal Dichalcogenides (TMDs), emerge as promising alternatives to enhance efficiency at the same length scale. Among them, WTe2 stands out due to its unique properties including topological states, Weyl semimetal character and graphene-like high electron mobility.

We investigate cleaved bulk WTe2 using a Scanning Tunneling Microscope at 330 mK. With scanning tunneling spectroscopy, the electronic properties and their dependence on vector magnetic fields are studied on the surface of bulk WTe*, as well as at step edges and twin domain boundaries. We scrutinize the topological nature of the edge states and observe a reduced density of states around zero bias in bulk WTe2.

Keywords: WTe2; Scanning Tunneling Microscope (STM); Transition Metal Dichalcogenides (TMDs); Topology; Magnetic Field