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Título:
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Ultrafast atomic diffusion inducing a reversible (2?3x2?3) R30º ? (?3x?3) R30º transition on Sn/Si (111)?B
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Autores:
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Abuín Herráez, Manuel
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2015-05-13
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Tipo = Artículo
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Resumen:
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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 degrees 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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En línea:
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https://eprints.ucm.es/41524/1/Abuin%2001%20libre.pdf
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