bei Google ScholarTitelangaben
Kim, Jihyun ; Seo, Jikeun ; Rojas, Geoffrey ; Chen, X. ; Enders, Axel ; Kim, Jae-Sung:
Instability and transformation kinetics of the reconstructions in carburized W(1 1 0).
In: Applied Surface Science.
Bd. 535
(2021)
.
- 147663.
ISSN 1873-5584
DOI: https://doi.org/10.1016/j.apsusc.2020.147663
Abstract
We investigate the instability and transformation kinetics of the carbon-induced surface reconstructions on W(1 1 0) by the low temperature scanning tunneling microscopy. R (15 × 3) reconstruction, a moiré pattern of W2C(0 0 0 1) bi-layer on W(1 1 0), is the most carbon-rich reconstruction on the carburized W(1 1 0), which gradually transforms to the most carbon-poor R (15 × 12) reconstruction by repeated annealing at around 2070 K. In between, various reconstructions, albeit not globally ordered, develop. Notable is that all the observed reconstructions are invariably composed of only two kinds of building blocks, namely A-block and B-block. A-block is the surface unit cell of the R (15 × 3) reconstruction. During the transformation, the virtually carbon free B-block is created at the cost of two neighboring A-blocks by the annealing. The robustness of the block structure allows us to perform a coarse-grained kinetic Monte Carlo simulation of the transformation in terms of the creation and diffusion of B-blocks on the R (15 × 3) lattice that is initially entirely tiled by A-blocks. We find that the transformation kinetics is governed by both the anisotropic creation and diffusion of B-block that are attributed to the instability of A-block driven by the anisotropic compressive stress in it.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Moire pattern; Tungsten carbide; Transformation kinetics; STM; Kinetic Monte Carlo simulation; Nano patterning |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik XI und Didaktik der Physik Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik XI und Didaktik der Physik > Lehrstuhl Experimentalphysik XI und Didaktik der Physik - Univ.-Prof. Dr. Axel Enders Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 10 Feb 2021 08:06 |
| Letzte Änderung: | 07 Nov 2023 10:48 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/62839 |