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Phase coexistence during surface phase transitions | J B Hannon
; F J zu Heringdorf
; J Tersoff
; R M Tromp
; | Date: |
21 May 2001 | Journal: | Phys Rev Lett, 86 (21), 4871-4 | Abstract: | In contrast to standard thermodynamic models, we observe phase coexistence over an extended temperature range at a first-order surface phase transition. We have measured the domain evolution of the Si(111)-( 7x7) to ( 1x1) phase transition with temperature, using low-energy electron microscopy. Comparison with detailed, quantitative theoretical predictions shows that coexistence is due to long-range elastic and electrostatic domain interactions. Phase coexistence is predicted to be a universal feature of surface phase transitions. | Source: | PubMed, pmid11384369 | Services: | Forum | Review | Favorites |
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