| Autor: |
W, Srour, Daniel G, Trabada, J I, Martínez, F, Flores, J, Ortega, M, Abuín, Y, Fagot-Revurat, B, Kierren, A, Taleb-Ibrahimi, D, Malterre, A, Tejeda |
| Rok vydání: |
2014 |
| Zdroj: |
Physical review letters. 114(19) |
| ISSN: |
1079-7114 |
| Popis: |
Dynamical phase transitions are a challenge to identify experimentally and describe theoretically. Here, we study a new reconstruction of Sn on silicon and observe a reversible transition where the surface unit cell divides its area by a factor of 4 at 250 °C. This phase transition is explained by the 24-fold degeneracy of the ground state and a novel diffusive mechanism, where four Sn atoms arranged in a snakelike cluster wiggle at the surface exploring collectively the different quantum mechanical ground states. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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