We report accurate calculations of the particle density of states in the dipolar hard-sphere fluid. Implementing efficient and tailored Monte Carlo algorithms, we are able to explore, in equilibrium, the low temperature region where a phase separation between a dilute gas of chain ends and a high-density liquid of chain junctions has been predicted to occur. Our data clearly show that the density of states remains always single peaked, definitively excluding the possibility of critical phenomena in the investigated temperature and density region. The analysis of the low temperature configurations shows that at low densities particles preferentially self-assemble into closed rings, strongly suppressing the chain ends concentration.
No Evidence of Gas-Liquid Coexistence in Dipolar Hard Spheres / Rovigatti, Lorenzo; Russo, John; Sciortino, Francesco. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 107:23(2011). [10.1103/physrevlett.107.237801]
No Evidence of Gas-Liquid Coexistence in Dipolar Hard Spheres
ROVIGATTI, LORENZO;RUSSO, JOHN;SCIORTINO, Francesco
2011
Abstract
We report accurate calculations of the particle density of states in the dipolar hard-sphere fluid. Implementing efficient and tailored Monte Carlo algorithms, we are able to explore, in equilibrium, the low temperature region where a phase separation between a dilute gas of chain ends and a high-density liquid of chain junctions has been predicted to occur. Our data clearly show that the density of states remains always single peaked, definitively excluding the possibility of critical phenomena in the investigated temperature and density region. The analysis of the low temperature configurations shows that at low densities particles preferentially self-assemble into closed rings, strongly suppressing the chain ends concentration.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.