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Lamellar order, microphase structures, and glassy phase in a field theoretic model for charged colloids | | Marco Tarzia
; Antonio Coniglio
; | | Date: |
31 Dec 2006 | | Journal: | Phys Rev E, 75 (1 Pt 1), 011410 | | Abstract: | In this paper we present a detailed analytical study of the phase diagram and of the structural properties of a field theoretic model with a short-range attraction and a competing long-range screened repulsion. We provide a full derivation and expanded discussion and digression on results previously reported briefly in M. Tarzia and A. Coniglio, Phys. Rev. Lett. 96, 075702 (2006). The model contains the essential features of the effective interaction potential among charged colloids in polymeric solutions. We employ the self-consistent Hartree approximation and a replica approach, and we show that varying the parameters of the repulsive potential and the temperature yields a phase coexistence, a lamellar and a glassy phase. Our results suggest that the cluster phase observed in charged colloids might be the signature of an underlying equilibrium lamellar phase, hidden on experimental time scales, and emphasize that the formation of microphase structures may play a prominent role in the process of colloidal gelation. | | Source: | PubMed, pmid17358153 | | Other source: | [GID 850460] cond-mat/0701561 | | Services: | Forum | Review | Favorites | |
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