103 citations · 196 across the 4 of their papers we have counts for
4 papers
Dimer motion on a periodic substrate: Spontaneous symmetry breaking and absolute negative mobility
David Speer, Ralf Eichhorn, Mykhaylo Evstigneev +1
We consider two coupled particles moving along a periodic substrate potential with negligible inertia effects (overdamped limit). Even when the particles are identical and the subs…
Exploiting lattice potentials for sorting chiral particles
David Speer, Ralf Eichhorn, Peter Reimann
Several ways are demonstrated of how periodic potentials can be exploited for sorting molecules or other small objects which only differ by their chirality. With the help of a stat…
Directing Brownian motion on a periodic surface
D. Speer, R. Eichhorn, P. Reimann
We consider an overdamped Brownian particle, exposed to a two-dimensional, square lattice potential and a rectangular ac-drive. Depending on the driving amplitude, the linear respo…
Observation of negative absolute resistance in a Josephson junction
J. Nagel, D. Speer, T. Gaber +7
We experimentally demonstrate the occurrence of negative absolute resistance (NAR) up to about in response to an externally applied dc current for a shunted Nb-Al/AlO-Nb…