57 citations · 276 across the 17 of their papers we have counts for
17 papers
Colloidal transport in twisted lattices of optical tweezers
Nex C. X. Stuhlmüller, Thomas M. Fischer, Daniel de las Heras
We simulate the transport of colloidal particles driven by a static and homogeneous drift force, and subject to the optical potential created by two lattices of optical tweezers. T…
Enhanced colloidal transport in twisted magnetic patterns
N. C. X. Stuhlmüller, T. M. Fischer, D. de las Heras
Bilayers of two-dimensional materials twisted at specific angles can exhibit exceptional properties such as the occurrence of unconventional superconductivity in twisted graphene.…
Adiabatic and irreversible classical discrete time crystals
Adrian Ernst, Anna M. E. B. Rossi, Thomas M. Fischer
We simulate the dynamics of paramagnetic colloidal particles that are placed above a magnetic hexagonal pattern and exposed to an external field periodically changing its direction…
The geometric phase and the dry friction of sleeping tops on inclined planes
Sven Barthmann, Thomas M. Fischer
We report on the motion of a spinning sleeping top on an inclined plane. Below a critical inclination angle the sleeping tops are force free. The trajectory of a sleeping top on we…
Simultaneous polydirectional transport of colloidal bipeds
Mahla Mirzaee-Kakhki, Adrian Ernst, Daniel de las Heras +6
Detailed control over the motion of colloidal particles is relevant in many applications in colloidal science such as lab-on-a-chip devices. Here, we use an external magnetic field…
Colloidal trains
Mahla Mirzaee-Kakhki, Adrian Ernst, Daniel de las Heras +10
Single and double paramagnetic colloidal particles are placed above a magnetic square pattern and are driven with an external magnetic field precessing around a high symmetry direc…
Hard topological versus soft geometrical magnetic particle transport
Anna M. E. B. Rossi, Jonas Bugase, Thomas Lachner +3
The transport on top of a periodic two-dimensional hexagonal magnetic pattern of (i) a single macroscopic steel sphere, (ii) a doublet of wax/magnetite composite spheres, and (iii)…
Edge states at the boundary between topologically equivalent lattices
Helena Massana-Cid, Adrian Ernst, Daniel de las Heras +9
Edge currents of paramagnetic colloidal particles propagate at the edge between two topologically equivalent magnetic lattices of different lattice constant when the system is driv…
Blood crystal: emergent order of red blood cells under wall-confined shear flow
Zaiyi Shen, Thomas M. Fischer, Alexander Farutin +3
Driven or active suspensions can display fascinating collective behavior, where coherent motions or structures arise on a scale much larger than that of the constituent particles.…
Colloidal topological insulators
Johannes Loehr, Daniel de las Heras, Adam Jarosz +8
Topological insulators insulate in the bulk but exhibit robust conducting edge states protected by the topology of the bulk material. Here, we design a colloidal topological insula…
Macroscopic Floquet topological crystalline steel pump
Anna M. E. B. Rossi, Jonas Bugase, Thomas M. Fischer
The transport of a steel sphere on top of two dimensional periodic magnetic patterns is studied experimentally. Transport of the sphere is achieved by moving an external permanent…
Lattice symmetries and the topological protected transport of colloidal particles
Johannes Loehr, Daniel de las Heras, Michael Loenne +10
The topologically protected transport of colloidal particles on top of magnetic patterns of all possible single lattice constant two dimensional magnetic point group symmetries is…
Topologically protected colloidal transport above a square magnetic lattice
Daniel de las Heras, Johannes Loehr, Michael Loenne +1
We theoretically study the motion of magnetic colloidal particles above a magnetic pattern and compare the predictions with Brownian dynamics simulations. The pattern consists of a…
Topological protection of multiparticle dissipative transport
Johannes Loehr, Michael Loenne, Adrian Ernst +2
Topological protection allows robust transport of localized phenomena such as quantum information, solitons, and dislocations. The transport can be either dissipative or non-dissip…
Fast and rewritable colloidal assembly via field synchronized particle swapping
Pietro Tierno, Tom H. Johansen, Thomas M. Fischer
We report a technique to realize reconfigurable colloidal crystals by using the controlled motion of particle defects above an externally modulated magnetic substrate. The transpor…
Excluded volume causes integer and fractional plateaus in colloidal ratchet currents
Pietro Tierno, Thomas M. Fischer
We study the collective transport of paramagnetic colloids driven above a magnetic bubble lattice by an external rotating magnetic field. We measure a direct ratchet current which…
Hydrodynamic attraction and repulsion between asymmetric rotors
Steffen Schreiber, Thomas Fischer, Walter Zimmermann
At low Reynolds numbers, the hydrodynamic interaction between dumbbells driven by an external rotating field can be attractive or repulsive. Dumbbells of dissimilar asymmetric shap…