| Autor: |
J.-K. Zuo, J. F. Wendelken, J. M. Carpinelli, D. M. Zehner |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
Physical review. B, Condensed matter. 53(23) |
| ISSN: |
0163-1829 |
| Popis: |
We have studied the morphologies of the TaC(310), (210), and (110) surfaces using scanning tunneling microscopy. Heating the crystals to high temperatures activates a faceting of these surfaces into a hill-and-valley structure consisting of enlarged (100) terraces and (010) step walls. Step-separation distributions obtained from these surfaces can be well fit by sharp Gaussians and are much narrower than predicted for the noninteracting terrace-step-kink model, indicating a strong repulsive interaction exists between steps on the faceted surfaces. This faceting is suggested to be driven by a decrease in the total step repulsive energy through a reduction of the total number of step pairs. {copyright} {ital 1996 The American Physical Society.} |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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