We report subnanometer, high-bandwidth measurements of the out-of-plane (vertical) motion of atoms in freestanding graphene using scanning tunneling microscopy. By tracking the vertical position over a long time period, a 1000-fold increase in the ability to measure space-time dynamics of atomically thin membranes is achieved over the current state-of-the-art imaging technologies. We observe that the vertical motion of a graphene membrane exhibits rare long-scale excursions characterized by both anomalous mean-squared displacements and Cauchy-Lorentz power law jump distributions.
- Received 6 May 2016
DOI:https://doi.org/10.1103/PhysRevLett.117.126801
© 2016 American Physical Society
Polymers & Soft MatterStatistical PhysicsCondensed Matter & Materials Physics
Source: http://link.aps.org/doi/10.1103/PhysRevLett.117.126801
