Volume 119, Number 4, August 2017
|Number of page(s)||6|
|Published online||30 October 2017|
Macroscopic Floquet topological crystalline steel and superconductor pump
Experimental Physics, Institute of Physics and Mathematics, Universität Bayreuth - 95440 Bayreuth, Germany
Received: 26 July 2017
Accepted: 28 September 2017
The transport of a macroscopic steel sphere and a superconducting sphere on top of two-dimensional periodic magnetic patterns is studied experimentally and compared with the theory and with experiments on topological transport of magnetic colloids. Transport of the steel and superconducting sphere is achieved by moving an external permanent magnet on a closed loop around the two-dimensional crystal. The transport is topological, i.e., the spheres are transported by a primitive unit vector of the lattice when the external magnet loop winds around specific directions. We experimentally determine the set of directions the loops must enclose for nontrivial transport of the spheres into various directions. We show that the loops can be used to sort steel and superconducting spheres. We show that the topological transport is robust with respect to the scale of the system and therefore speculate on its down scalability to the molecular scale.
PACS: 02.40.Pc – General topology / 03.65.Vf – Phases: geometric; dynamic or topological / 05.60.Cd – Classical transport
© EPLA, 2017
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