Ultrafast Atomic Diffusion Inducing a Reversible (2sqrt[3]×2sqrt[3])R30°â(sqrt[3]×sqrt[3])R30° Transition on Sn/Si(111)â¶B.
Phys Rev Lett
; 114(19): 196101, 2015 May 15.
Article
de En
| MEDLINE
| ID: mdl-26024183
ABSTRACT
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.
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Collection:
01-internacional
Base de données:
MEDLINE
Type d'étude:
Prognostic_studies
Langue:
En
Journal:
Phys Rev Lett
Année:
2015
Type de document:
Article
Pays d'affiliation:
France