Die u:cris Detailansicht:
Unraveling the 3D Atomic Structure of a Suspended Graphene/hBN van der Waals Heterostructure
- Autor(en)
- Giacomo Argentero, Andreas Mittelberger, Mohammad Reza Ahmad Pour Monazam, Yang Cao, Timothy J. Pennycook, Clemens Mangler, Christian Kramberger, Jani Kotakoski, A. K. Geim, Jannik C. Meyer
- Abstrakt
In this work we demonstrate that a free-standing van der Waals heterostructure, usually regarded as a flat object, can exhibit an intrinsic buckled atomic structure resulting from the interaction between two layers with a small lattice mismatch. We studied a freely suspended membrane of well-aligned graphene on a hexagonal boron nitride (hBN) monolayer by transmission electron microscopy (TEM) and scanning TEM (STEM). We developed a detection method in the STEM that is capable of recording the direction of the scattered electron beam and that is extremely sensitive to the local stacking of atoms. A comparison between experimental data and simulated models shows that the heterostructure effectively bends in the out-of-plane direction, producing an undulated structure having a periodicity that matches the moire wavelength. We attribute this rippling to the interlayer interaction and also show how this affects the intralayer strain in each layer.
- Organisation(en)
- Physik Nanostrukturierter Materialien
- Externe Organisation(en)
- University of Manchester
- Journal
- Nano Letters: a journal dedicated to nanoscience and nanotechnology
- Band
- 17
- Seiten
- 1409-1416
- Anzahl der Seiten
- 8
- ISSN
- 1530-6984
- Publikationsdatum
- 03-2017
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103018 Materialphysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Condensed Matter Physics, Mechanical Engineering, Bioengineering, Allgemeine Chemie, Allgemeine Materialwissenschaften
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/72f5b7b6-831e-426f-bb67-6567134334cb