Generalized Haldane models on laser-coupling optical lattices.

Abstract:

:We propose two generalized Haldane models on laser-coupling optical lattices. Laser-assisted nearest neighbour tunnelings generate artificial staggered magnetic flux, facilitating the realization of topological nontrivial band structures. As generalizations of Haldane model, these models support topological insulator and semimetal phases featuring high Chern numbers. We show simple rules for computing Chern numbers of our models and display the phase diagrams. Moreover, numerical calculations of energy spectra are in perfect agreement with our theoretical expectations. Our models may serve as two new family members for generalizing Haldane model on optical lattices.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Liu W,Lin Z,Wang ZD,Chen Y

doi

10.1038/s41598-018-30503-9

subject

Has Abstract

pub_date

2018-08-27 00:00:00

pages

12898

issue

1

issn

2045-2322

pii

10.1038/s41598-018-30503-9

journal_volume

8

pub_type

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