Rippling ultrafast dynamics of suspended 2D monolayers, graphene
Abstract
Rippling is an intrinsic feature of 2D materials, responsible for their structural stability, transport properties, and electron–hole charge redistribution. Modulating these ripples in a controlled manner not only provides a better understanding of their structural properties, but also has potential impact for applications. Here, we examine graphene monolayer as a prototypical 2D material. An ultrafast attenuation of the ripples intrinsically present in the graphene plane is followed by a significant enhancement of the rippling effect on a longer time scale, as driven by the successive excitation of in-plane and out-of-plane phonon modes. The methodology described is of a general nature and is suitable for the investigation of other 2D materials, where we expect to observe similar rippling effects.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 10, 2016
- Source ID
- 10.1073/pnas.1613818113
Entities
People
- Ahmed Zewail
- Andrea Cepellotti
- Giovanni M. Vanacore
- Jianbo Hu
- Nicola Marzari
Organizations
- Air Force Office of Scientific Research
- California Institute of Technology
- Gordon and Betty Moore Foundation
- Swiss Federal Institute of Technology in Lausanne
- Swiss National Science Foundation