6 papers
Two-dimensional colloidal mixtures in magnetic and gravitational fields
Hartmut Löwen, Tobias Horn, Tim Neuhaus +1
This mini-review is concerned with two-dimensional colloidal mixtures exposed to various kinds of external fields. By a magnetic field perpendicular to the plane, dipole moments ar…
Compatibility waves drive crystal growth on patterned substrates
Tim Neuhaus, Michael Schmiedeberg, Hartmut Löwen
We explore the crystallization in a colloidal monolayer on a structured template starting from a few-particle nucleus. The competition between the substrate structure and that of t…
Rhombic preordering on a square substrate
T. Neuhaus, M. Marechal, M. Schmiedeberg +1
A competition of incommensurate symmetries occurs whenever a system is forced to conform to an ordering that is different from the intrinsically preferred structure of the system i…
Soft repulsive mixtures under gravity: brazil-nut effect, depletion bubbles, boundary layering, nonequilibrium shaking
Tobias Kruppa, Tim Neuhaus, René Messina +1
A binary mixture of particles interacting via long-ranged repulsive forces is studied in gravity by computer simulation and theory. The more repulsive A-particles create a depletio…
Fluid phase separation inside a static periodic field: an effectively two-dimensional critical phenomenon
Richard Vink, Tim Neuhaus, Hartmut Loewen
When a fluid with a bulk liquid-vapor critical point is placed inside a static external field with spatial periodic oscillations in one direction, the bulk critical point splits in…
Phonon dispersions of cluster crystals
Tim Neuhaus, Christos N. Likos
We analyze the ground states and the elementary collective excitations (phonons) of a class of systems, which form cluster crystals in the absence of attractions. Whereas the regim…