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Title data
Löhr, Johannes ; de las Heras, Daniel ; Jarosz, Adam ; Urbaniak, Maciej ; Stobiecki, Feliks ; Tomita, Andreea ; Huhnstock, Rico ; Koch, Iris ; Ehresmann, Arno ; Holzinger, Dennis ; Fischer, Thomas M.:
Colloidal topological insulators.
In: Communications Physics.
Vol. 2018
(22 February 2018)
Issue 1
.
- No. 4.
ISSN 2399-3650
DOI der Verlagsversion: https://doi.org/10.1038/s42005-017-0004-1
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Abstract
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 insulator and demonstrate experimentally the occurrence of edge states in a classical particle system. Magnetic colloidal particles travel along the edge of two distinct magnetic lattices. We drive the colloids with a uniform external magnetic field that performs a topologically non-trivial modulation loop. The loop induces closed orbits in the bulk of the magnetic lattices. At the edge, where both lattices merge, the colloids perform skipping orbits trajectories and hence edge-transport. We also observe paramagnetic and diamagnetic colloids moving in opposite directions along the edge between two inverted patterns; the analogue of a quantum spin Hall effect in topological insulators. We present a robust and versatile way of transporting colloidal particles, enabling new pathways towards lab on a chip applications.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | topological insulators; colloidal particles |
| DDC Subjects: | 500 Science 500 Science > 530 Physics |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics II Faculties |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-4225-2 |
| Date Deposited: | 25 Feb 2019 09:01 |
| Last Modified: | 07 Jul 2020 10:43 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/4225 |
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