127 citations · 1.1k across the 19 of their papers we have counts for
19 papers
Tracking shear mode dynamics across the glass transition in a 2D colloidal system
Jimin Bai, Peter Keim, Matteo Baggioli
Long-wavelength collective shear dynamics are profoundly different in solids and liquids. According to the theoretical framework developed by Maxwell and Frenkel, collective shear…
Stealthy and hyperuniform isotropic photonic bandgap structure in 3D
Lukas Siedentop, Gianluc Lui, Georg Maret +5
In photonic crystals the propagation of light is governed by their photonic band structure, an ensemble of propagating states grouped into bands, separated by photonic band gaps. D…
Strain pattern in supercooled liquids
Bernd Illing, Sebastian Fritschi, David Hajnal +3
Investigations of strain correlations at the glass transition reveal unexpected phenomena. The shear strain fluctuations show an Eshelby-strain pattern (),…
Kibble-Zurek mechanism in colloidal monolayers
Sven Deutschländer, Patrick Dillmann, Georg Maret +1
The Kibble-Zurek mechanism describes the evolution of topological defect structures like domain walls, strings, and monopoles when a system is driven through a second order phase t…
Discontinuous shear modulus determines the glass transition temperature
Christian L. Klix, Georg Maret, Peter Keim
A solid - amorphous or crystalline - is defined by a finite shear modulus while a fluid lacks such. We thus experimentally investigate the elastic properties of a colloidal glass f…
Entropy and Kinetics of Point-Defects in Two-Dimensional Dipolar Crystals
Wolfgang Lechner, David Polster, Georg Maret +2
We study in experiment and with computer simulation the free energy and the kinetics of vacancy and interstitial defects in two-dimensional dipolar crystals. The defects appear in…
Specific heat in two-dimensional melting
Sven Deutschländer, Antonio M. Puertas, Georg Maret +1
We report the specific heat around the melting transition(s) of micrometer-sized superparamagnetic particles confined in two dimensions, calculated from fluctuations of posit…
Two-dimensional melting under quenched disorder
Sven Deutschländer, Tobias Kruppa, Hartmut Löwen +2
We study the influence of quenched disorder on the two-dimensional melting behavior by using both video-microscopy of superparamagnetic colloidal particles and computer simulations…
Spontaneous symmetry breaking in 2D: Kibble-Zurek mechanism in temperature quenched colloidal monolayers
Patrick Dillmann, Georg Maret, Peter Keim
The Kibble-Zurek mechanism describes the formation of topological defects during spontaneous symmetry breaking for quite different systems. Shortly after the big bang, the isotropy…
Comparison of 2D melting criteria in a colloidal system
Patrick Dillmann, Georg Maret, Peter Keim
We use super-paramagnetic spherical particles which are arranged in a two-dimensional monolayer at a water/air interface to investigate the crystal to liquid phase transition. Acco…
Glass elasticity from particle trajectories
Christian L. Klix, Florian Ebert, Fabian Weysser +3
Using positional data from video-microscopy of a two-dimensional colloidal system and from simulations of hard discs we determine the wave-vector-dependent normal mode spring const…
Crystal nuclei and structural correlations in two-dimensional colloidal mixtures: experiment versus simulation
L Assoud, F Ebert, P Keim +3
We examine binary mixtures of superparamagnetic colloidal particles confined to a two-dimensional water-air interface both by real-space experiments and Monte-Carlo computer simula…
The experimental realization of a two-dimensional colloidal model system
F. Ebert, P. Dillmann, G. Maret +1
We present the technical details of an experimental method to realize a model system for 2D phase transitions and the glass transition. The system consists of several hundred thous…
Dynamics of particles and cages in an experimental 2D glass former
S. Mazoyer, F. Ebert, G. Maret +1
We investigate the dynamics of a glass forming 2D colloidal mixture and show the existence of collective motions of the particles. We introduce a mean square displacement MSD with…
Partial clustering prevents global crystallization in a binary 2D colloidal glass former
F. Ebert, G. Maret, P. Keim
A mixture of two types of super-paramagnetic colloidal particles with long range dipolar interaction is confined by gravity to a flat interface of a hanging water droplet. The part…
Ultra-fast quenching of binary colloidal suspensions in an external magnetic field
Lahcen Assoud, Florian Ebert, Peter Keim +3
An ultra-fast quench is applied to binary mixtures of superparamagnetic colloidal particles confined at a two-dimensional water-air interface by a sudden increase of an external ma…
Frank's constant in the hexatic phase
P. Keim, G. Maret, H. H. von Gruenberg
Using video-microscopy data of a two-dimensional colloidal system the bond-order correlation function G6 is calculated and used to determine the temperature-dependence of both the…
Elastic Behavior of a Two-dimensional Crystal near Melting
H. H. von Grünberg, P. Keim, K. Zahn +1
Using positional data from video-microscopy we determine the elastic moduli of two-dimensional colloidal crystals as a function of temperature. The moduli are extracted from the wa…
Harmonic lattice behavior of two-dimensional colloidal crystals
P. Keim, G. Maret, U. Herz +1
Using positional data from video-microscopy and applying the equipartition theorem for harmonic Hamiltonians, we determine the wave-vector-dependent normal mode spring constants of…