Phase-Coherent Transport in Two-Dimensional Tellurium Flakes.

Elemental tellurium (Te) is a compelling van der Waals material due to its interesting chiral crystal structure and predicted topological properties. Here, we report the fabrication and comprehensive quantum transport study of devices based on Te flakes with varying thicknesses. We demonstrate a hole mobility reaching up to 1000 cm2/V·s in a 17 nm thick flake at 30 K. At deep cryogenic temperatures (<50mK), the transport characteristics transition from Coulomb blockade in the low carrier density regime to pronounced Fabry-Pérot (F-P) interference at higher densities. Notably, the visibility of these F-P oscillations is significantly enhanced in the thinner flake device. The application of a magnetic field reveals a clear Zeeman splitting of the conductance peaks. The rich variety of quantum transport phenomena (Coulomb blockade, F-P interference, Zeeman splitting) observed underscores the high quality of our thin Te flakes and establishes them as a promising material for exploring physics and device concepts, such as topological superconductivity and low-power spintronic applications.