Unusual phase behavior of one-component systems with two-scale isotropic interactions

Buldyrev, Sergey V.; Malescio, G.; Angell, C. Austen; Giovambattista, Nicolás; Prestipino, Santi; Saija, Franz; Stanley, H. Eugene; Xu, Limei

doi:10.1088/0953-8984/21/50/504106

Cited by 105 publications

(121 citation statements)

References 128 publications

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“…Some typical examples are silica, silicon, phosphorus, etc. A lot of different core-softened potentials were introduced (see, for example, reviews [11,12]). However, it should be noted that in general the existence of two length scales is not compulsory to induce the occurrence of the anomalies.…”

Section: Introductionmentioning

confidence: 99%

Effect of a potential softness on the solid-liquid transition in a two-dimensional core-softened potential system

Dudalov

Tsiok

Fomin

et al. 2014

The Journal of Chemical Physics

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In the present paper, using a molecular dynamics simulation, we study a nature of melting of a two-dimensional (2D) system of classical particles interacting through a purely repulsive isotropic core-softened potential which is used for the qualitative description of the anomalous behavior of water and some other liquids. We show that the melting scenario drastically depends on the potential softness and changes with increasing the width of the smooth repulsive shoulder. While at small width of the repulsive shoulder the melting transition exhibits what appears to be weakly first-order behavior, at larger values of the width a reentrant-melting transition occurs upon compression for not too high pressures, and in the low density part of the 2D phase diagram melting is a continuous two-stage transition, with an intermediate hexatic phase in accordance with the Kosterlitz-ThoulessHalperin-Nelson-Young (KTHNY) scenario. On the other hand, at high density part of the phase diagram one first-order transition takes place. These results may be useful for the qualitative understanding the behavior of water confined between two hydrophobic plates.

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Section: Introductionmentioning

confidence: 99%

Effect of a potential softness on the solid-liquid transition in a two-dimensional core-softened potential system

Dudalov

Tsiok

Fomin

et al. 2014

The Journal of Chemical Physics

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“…Important information about complicated systems including water, glasses and fluid-fluid phase transitions has been revealed using soft-core isotropic potentials, even when there is anisotropy in the non-coarse grained molecular potentials -see the review by Buldyrev et al [19]. If the potentials are selective and have two length-scales, frustration can in principle be created which can lead to nanometre or micron scale patterns, although this is not assured.…”

Section: Introductionmentioning

confidence: 99%

The self-assembly of particles with isotropic interactions

Konigslow¹,

Cardenas-Mendez²,

Thompson³

et al. 2013

J. Phys.: Condens. Matter

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A generic field-theoretic model for the self-assembly of particles with isotropic interactions, mo tivated by ideas in DNA-mediated colloidal assembly, is presented. A simplest possible system of colloids in explicit solvent is examined to determine the ability of non-connected particles to form complex nanometre or micron scale equilibrium structures in the absence of confounding ki netic effects. It is found that non-trivial morphologies are possible and that, for this effectively one component system, these parallel the phases of diblock copolymer melts for certain parameter choices, despite the absence of connectivity or packing frustration in the model. An explanation for the morphological similarity between these architecturally disparate systems is given. For other parameter choices, it is found that meta-stable and defected phases become more common, and that similarity with block copolymer morphologies decreases.

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“…It is reasonable to relate this kind of behavior to the orientational anisotropy of the potentials, however, a number of studies demonstrate water-like anomalies in fluids that interact through spherically symmetric coresoftening potentials with two length scales (see, for example, the reviews [21] and [22]). A lot of different coresoftened potentials were introduced.…”

Section: Introductionmentioning

confidence: 99%

Inversion of sequence of diffusion and density anomalies in core-softened systems

Fomin

Tsiok

Ryzhov

2011

The Journal of Chemical Physics

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In this paper we present a simulation study of water-like anomalies in core-softened system introduced in our previous publications. We investigate the anomalous regions for a system with the same functional form of the potential but with different parameters and show that the order of the region of anomalous diffusion and the region of density anomaly is inverted with increasing the width of the repulsive shoulder.

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Unusual phase behavior of one-component systems with two-scale isotropic interactions

Cited by 105 publications

References 128 publications

Effect of a potential softness on the solid-liquid transition in a two-dimensional core-softened potential system

Effect of a potential softness on the solid-liquid transition in a two-dimensional core-softened potential system

The self-assembly of particles with isotropic interactions

Inversion of sequence of diffusion and density anomalies in core-softened systems

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