Artificial spin ices consist of nanomagnets arranged on the sites of various periodic and
aperiodic lattices. They have enabled the experimental investigation of a variety of …

Over the recent decades there has been tremendous progress in understanding and
controlling friction between surfaces in relative motion. However the complex nature of the …

Geometric frustration and the ice rule are two concepts that are intimately connected and
widespread across condensed matter. The first refers to the inability of a system to satisfy …

The sliding motion of objects is typically governed by their friction with the underlying
surface. Compared to translational friction, however, rotational friction has received much …

When particles are driven across crystalline surfaces, their trajectories do not necessarily
follow the applied force but become locked to the substrate lattice directions. Such …

This paper reports tunable Ni 80 Fe 20 artificial spin ice structures of various geometrical
lattice arrangements as a function of film thickness. We achieve the magnetic tunability by …

Using continuum based simulations we show that a rich variety of skyrmion liquid crystal
states can be realized in the presence of a periodic obstacle array. As a function of the …

We propose the first skyrmion spin ice, realized via confined, interacting liquid crystal
skyrmions. Skyrmions in a chiral nematic liquid crystal behave as quasiparticles that can be …

Lattice transformations that preserve the system topology, but not its geometry, are common
in condensed matter systems. However, how geometric constrains influence the topological …

Both the Rys F-model and antiferromagnetic square ice possess the same ordered,
antiferromagnetic ground state, but the ordering transition is of second order in the latter …