A spherical model with directional interactions: II. Dynamics and landscape properties (Articolo in rivista)

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  • A spherical model with directional interactions: II. Dynamics and landscape properties (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0953-8984/22/10/104110 (literal)
Alternative label
  • Christian Mayer (1,2); Francesco Sciortino (1,2); Piero Tartaglia (1,3); Emanuela Zaccarelli (1,2) (2010)
    A spherical model with directional interactions: II. Dynamics and landscape properties
    in Journal of physics. Condensed matter (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Christian Mayer (1,2); Francesco Sciortino (1,2); Piero Tartaglia (1,3); Emanuela Zaccarelli (1,2) (literal)
Pagina inizio
  • 104110 (literal)
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  • Conference: Workshop on New Trends in Simulating Colloids and Self-Assembling Systems Location: Lausanne, SWITZERLAND Date: OCT 06-09, 2008 (literal)
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  • 22 (literal)
Rivista
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  • fasc. (10). IOP Publishing. (literal)
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  • 10 (literal)
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  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy (2) CNR-INFM-SOFT, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy (3) CNR-INFM-SMC, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Rome, Italy (literal)
Titolo
  • A spherical model with directional interactions: II. Dynamics and landscape properties (literal)
Abstract
  • We study a binary non-additive hard-sphere mixture with square well interactions only between dissimilar particles. An appropriate choice of the inter-particle potential parameters favors the formation of equilibrium structures with tetrahedral ordering (Zaccarelli et al 2007 J. Chem. Phys. 127 174501). By performing extensive event-driven molecular dynamics simulations, we monitor the dynamics of the system, locating the iso-diffusivity lines in the phase diagram, and discuss their location with respect to the gas-liquid phase separation. We observe the formation of an ideal gel which continuously crosses towards an attractive glass upon increasing the density. Moreover, we evaluate the statistical properties of the potential energy landscape for this model. We find that the configurational entropy, for densities within the optimal network-forming region, is finite even in the ground state and obeys a logarithmic dependence on the energy. (literal)
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