Phase behaviour of colloidal assemblies on 2D corrugated substrates

Autor:	Shawish, Samir El, Trizac, Emmanuel, Dobnikar, Jure
Rok vydání:	2012
Předmět:	Condensed Matter - Soft Condensed Matter
Zdroj:	J. Phys.: Condens. Matter 24, 284118 (2012)
Druh dokumentu:	Working Paper
DOI:	10.1088/0953-8984/24/28/284118
Popis:	We investigate - with Monte Carlo computer simulations - the phase behaviour of dimeric colloidal molecules on periodic substrates with square symmetry. The molecules are formed in a two-dimensional suspension of like charged colloids subject to periodic external confinement, which can be experimentally realized by optical methods. We study the evolution of positional and orientational order by varying the temperature across the melting transition. We propose and evaluate appropriate order parameters as well as the specific heat capacity and show that the decay of positional correlations belongs to a class of crossover transitions while the orientational melting is a second-order phase transition. Comment: 13 pages, 9 figures, accepted in J. Phys.: Condens. Matter
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1204.5361 Zobrazit plný text záznamu View this record from Arxiv