Electron transport through metal/MoS2 interfaces: edge- or area-dependent process?

Mathieu Luisier, Aron Szabo, Achint Jain, Markus Parzefall & Lukas Novotny
In ultra-thin two-dimensional (2-D) materials, the formation of ohmic contacts with top metallic layers is a challenging task that involves different processes than in bulk-like structures. Besides the Schottky barrier height, the transfer length of electrons between metals and 2-D monolayers is a highly relevant parameter. For MoS2, both short (≤30 nm) and long (≥0.5 μm) values have been reported, corresponding to either an abrupt carrier injection at the contact edge or a more gradual...
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