Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/109068
Type: Artigo de periódico
Title: Pressure Effects On The Transitions Between Disordered Phases In Supercooled Liquid Silicon
Author: Garcez K.M.S.
Antonelli A.
Abstract: We investigate the pressure effects on the transitions between the disordered phases in supercooled liquid silicon through Monte Carlo simulations and efficient methods to compute free energies. Our calculations, using an environment dependent interatomic potential for Si, indicate that at zero pressure the liquid-liquid phase transition, between the high density liquid and the low density liquid, occurs at a temperature 325K below melting. We found that the liquid-liquid transition temperature decreases with increasing pressure, following the liquid-solid coexistence curve. As pressure increases, the liquid-liquid coexistence curve approaches the region where the glass transition between the low density liquid and the low density amorphous takes place. Above 5 GPa, our calculations show that the liquid-liquid transition is suppressed by the glassy dynamics of the system. We also found that above 5 GPa, the glass transition temperature is lower than that at lower pressures, suggesting that under these conditions the glass transition occurs between the high density liquid and the high density amorphous. © 2011 American Institute of Physics.
Editor: 
Rights: aberto
Identifier DOI: 10.1063/1.3663387
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-82555192786&partnerID=40&md5=8ea74ccf4861ddc7bfc54ff2e563bc21
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.