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Dimensional crossover and cold-atom realization of topological Mott insulators

Scheurer, M. S. 1; Rachel, S.; Orth, P. P. 1
1 Institut für Theorie der Kondensierten Materie (TKM), Karlsruher Institut für Technologie (KIT)

Abstract:

Interacting cold-atomic gases in optical lattices offer an experimental approach to outstanding problems of many body physics. One important example is the interplay of interaction and topology which promises to generate a variety of exotic phases such as the fractionalized Chern insulator or the topological Mott insulator. Both theoretically understanding these states of matter and finding suitable systems that host them have proven to be challenging problems. Here we propose a cold-atom setup where Hubbard on-site interactions give rise to spin liquid-like phases: weak and strong topological Mott insulators. They represent the celebrated paradigm of an interacting and topological quantum state with fractionalized spinon excitations that inherit the topology of the non-interacting system. Our proposal shall help to pave the way for a controlled experimental investigation of this exotic state of matter in optical lattices. Furthermore, it allows for the investigation of a dimensional crossover from a two-dimensional quantum spin Hall insulating phase to a three-dimensional strong topological insulator by tuning the hopping between the layers.


Verlagsausgabe §
DOI: 10.5445/IR/1000045930
Veröffentlicht am 06.11.2018
Originalveröffentlichung
DOI: 10.1038/srep08386
Scopus
Zitationen: 25
Web of Science
Zitationen: 22
Dimensions
Zitationen: 28
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theorie der Kondensierten Materie (TKM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 2045-2322
urn:nbn:de:swb:90-459301
KITopen-ID: 1000045930
Erschienen in Scientific reports
Verlag Nature Research
Band 5
Heft 8386
Seiten 1-7
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter Topological insulators, Quantum fluids and solids, Ultracold gases, Theoretical physics
Nachgewiesen in Dimensions
Scopus
Web of Science
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