Low-Density Ionic Glass

Bosse, J.; Wilke, S.

doi:10.1103/physrevlett.80.1260

Cited by 29 publications

(37 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The limit of the HSS emerges from that calculations without actual excluded volume in the potentials. With the important difference of a finite hard-sphere radius being present, the possibility that in addition to a Coulomb crystal a dilute system of charges may also form a Coulomb glass was explored in the restricted primitive model for a mixture of charged hard spheres [30] and the hard-sphere jellium model [31] as well as for a system of charged hard spheres to describe charge-stabilized colloidal suspensions [32]. In conclusion, the present calculations offer exhaustive analyti-cal descriptions for glass transitions over a wide range of quite different interaction potentials.…”

Section: Discussionmentioning

confidence: 99%

Glass-transition properties of Yukawa potentials: From charged point particles to hard spheres

et al. 2014

View full text Add to dashboard Cite

The glass transition is investigated in three dimensions for single and double Yukawa potentials for the full range of control parameters. For vanishing screening parameter, the limit of the onecomponent plasma is obtained; for large screening parameters and high coupling strengths, the glass-transition properties crossover to the hard-sphere system. Between the two limits, the entire transition diagram can be described by analytical functions. Different from other potentials, the glass-transition and melting lines for Yukawa potentials are found to follow shifted but otherwise identical curves in control-parameter space.

show abstract

Section: Discussionmentioning

confidence: 99%

Glass-transition properties of Yukawa potentials: From charged point particles to hard spheres

et al. 2014

View full text Add to dashboard Cite

show abstract

“…To account for this difference, it was proposed [7] that the Laponite suspensions form so-called Wigner glasses, very low-density glasses whose formation is due to the existence of long-range Coulombic repulsions [14][15][16]. These repulsions originate from the strong surface charges at the faces of the colloidal disks, making that the effective volume fraction is very high.…”

Section: Preparation and Viscometrymentioning

confidence: 99%

Aging dynamics in a colloidal glass

Abou¹,

Bonn²,

Meunier³

2001

Phys. Rev. E

181

View full text Add to dashboard Cite

The aging dynamics of colloidal suspensions of Laponite, a synthetic clay, is investigated using dynamic light stattering (DLS) and viscometry after a quench into the glassy phase. DLS allows to follow the diffusion of Laponite particles and reveals that there are two modes of relaxation. The fast mode corresponds to a rapid diffusion of particles within "cages" formed by the neighboring particles. The slow mode corresponds to escape from the cages: its average relaxation time increases exponentially fast with the age of the glass. In addition, the slow mode has a broad distribution of relaxation times, its distribution becoming larger as the system ages. Measuring the concomitant increase of viscosity as the system ages, we can relate the slowing down of the particle dynamics to the viscosity.

show abstract

“…The second rationale behind the present experiments is the recent prediction of the existence of "Wigner glasses", very low-density glasses whose formation is due to the existence of longrange Coulombic interactions [7]. Wigner [8] predicted the existence of an electron crystal due to electrostatic interactions.…”

mentioning

confidence: 99%

“…The observed low-density glass thus has all the features of the "Wigner glass" described in ref. [7].…”

mentioning

confidence: 99%

“…The long range of these interactions causes the interparticle distance in these crystals to be much larger than the particle diameter, leading to very small densities compared to ordinary solids. A recent investigation of the so-called restricted primitive model [7] (RPM, a symmetrical binary mixture of charged spheres with opposite charges) revealed the possible existence of extremely low-density glassy phases stabilized by Coulombic interactions. In addition, for charged colloidal systems, recent theory also predicts the existence of rather low-density glasses due to Coulombic interactions [9].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Aging of a colloidal “Wigner” glass

Bonn¹,

Tanaka²,

Wegdam³

et al. 1999

Europhys. Lett.

230

242

View full text Add to dashboard Cite

PACS. 64.70Pf -Glass transitions. PACS. 61.20Lc -Time-dependent properties; relaxation.Abstract. -We study the aging of a colloidal glass, which is obtained for extremely low volume fractions due to strong electrostatic repulsions, leading to the formation of a "Wigner glass". During the aging, a new crossover between a complete and incomplete decay of the correlation function is observed, accompanied by an increase in the non-ergodicity parameter. The dynamics can be described as a cage-diffusion process. For short times, the escape of the particles from "cages" formed by neighbouring particles dominates; for long times the particles cannot escape anymore and the system becomes strongly non-ergodic.Glasses are a non-equilibrium form of matter and are, maybe for that reason, still illunderstood [1][2][3][4]. The usual way of looking at the glass transition is given by the so-called schematic mode-coupling theory [1,2]. In this theory, the glass transition is a strong ergodic to non-ergodic transition. In real systems, however, the "transition" always appears rounded. The rounding of the transition is due to the appearance of a "slow mode" in the system [1-4]. The non-equilibrium evolution of a system quenched into a glassy state is often referred to as aging, and is common to both structural and spin-glasses. Understanding the aging processes in a glassy system is crucial for the description of glassy dynamics; unfortunately, due to its very nature, the classical mode-coupling theory does not provide us with any information on the aging process [2].A recent careful inspection of the mode-coupling equations [4] reveals that this serious limitation may in fact be overcome. This work presents the first detailed description of the aging process. The evolution of the system is described in terms of the correlation and response functions of the system. Unfortunately, for most of the systems (structural glasses) studied to date, these quantities are not easy to obtain experimentally. For this reason, progress has been limited to a number of recent theoretical (spin-glass) and simulation (Lennard-Jones glass) studies [3,4]. The key result of both theory and simulations is that the diffusion may be looked upon as a cage-diffusion process. The particles reside in dynamic cages formed by c EDP Sciences

show abstract

Low-Density Ionic Glass

Cited by 29 publications

References 16 publications

Glass-transition properties of Yukawa potentials: From charged point particles to hard spheres

Glass-transition properties of Yukawa potentials: From charged point particles to hard spheres

Aging dynamics in a colloidal glass

Aging of a colloidal “Wigner” glass

Contact Info

Product

Resources

About