A guiding path for graphene circuits

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Science  20 Dec 2019:
Vol. 366, Issue 6472, pp. 1468-1469
DOI: 10.1126/science.366.6472.1468-g

The favorable optical, electronic, and mechanical properties of graphene make it a target material for nextgeneration opto-electronics. However, that graphene is an atomic layer thick, or several for bilayer and few-layer graphene, can make it challenging to pattern circuits with usual lithographic methods, especially at lateral nanometer scales. Cheng et al. show that a carbon nanotube, separated from the graphene by a thin layer of hexagonal boron nitride, creates a one-dimensional conduction path in the graphene that can be controlled by electrostatic gating. Demonstrating that the charged massless quasiparticles, Dirac fermions, can now be confined to an electronic waveguide provides a route to developing a platform for patterning complex graphene circuitry.

Phys. Rev. Lett. 123, 216804 (2019).

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