Coherent diffraction of hydrogen through the 246 pm lattice of graphene

Author(s)
Christian Brand, Maxime Debiossac, Toma Susi, François Aguillon, Jani Kotakoski, Philippe Roncin, Markus Arndt
Abstract

We study the diffraction of neutral hydrogen atoms through suspended single-layer graphene using molecular dynamics simulations based on density functional theory. Although the atoms have to overcome a transmission barrier, we find that the de Broglie wave function for H at 80 eV has a high probability to be coherently transmitted through about 18% of the graphene area. We propose an experiment to realize diffraction of atoms at the natural hexagon lattice period of 246 pm, leading to a more than 400-fold increase in beam separation of the coherently split atomic wave function compared to diffraction experiments at state-of-the art nano-machined masks. We expect this unusual wide coherent beam splitting to give rise to novel applications in atom interferometry.

Organisation(s)
Quantum Optics, Quantum Nanophysics and Quantum Information, Physics of Nanostructured Materials
Journal
New Journal of Physics
Volume
21
ISSN
1367-2630
DOI
https://doi.org/10.1088/1367-2630/ab05ed
Publication date
02-2019
Publication status
E-pub ahead of print
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/coherent-diffraction-of-hydrogen-through-the-246-pm-lattice-of-graphene(0945aa48-3d8b-4dbc-9af9-20c210ede272).html