| Issue |
EPL
Volume 120, Number 1, October 2017
|
|
|---|---|---|
| Article Number | 16002 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/120/16002 | |
| Published online | 18 December 2017 | |
Roughening of a stepped GaN grain boundary with increasing driving force for migration
1 Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM) Seoul National University, Seoul 08826, South Korea
2 Electron Microscopy Research Center, Korea Basic Science Institute - Daejeon 34133, South Korea
3 Stuttgart Center for Electron Microscopy, Max Planck Institute for Solid State Research Heisenbergstraße 1, 70569 Stuttgart, Germany
(a) bolee@snu.ac.kr
Received: 10 October 2017
Accepted: 19 November 2017
High-resolution transmission electron microscopy is applied to characterize the structure of a GaN grain boundary, which is subjected to the driving force for migration arising from the surface energy anisotropy during annealing at 500 °C in a transmission electron microscope. At a low driving force for migration, the grain boundary consists of atomically flat terrace regions interrupted by steps. As the driving force increases, grain-boundary steps become more frequent and undergo meandering, which is a typical attribute of kinetic roughening transition.
PACS: 68.35.Ja – Surface and interface dynamics and vibrations / 61.72.Mm – Grain and twin boundaries / 68.37.Og – High-resolution transmission electron microscopy (HRTEM)
© EPLA, 2017
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.