Optically engineering the topological properties in a two-dimensional square lattice

We investigate the possibility of optically manipulating the topological phase transition in a two-dimensional square lattice with staggered on-site energy and anisotropy next-nearest-neighbor hopping integral (an extended Haldane model), from the trivial insulator phase to the Chern insulator phase...

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Bibliographic Details
Published inEurophysics letters Vol. 99; no. 4; pp. 47007 - 47012
Main Authors Wang, Yi-Xiang, Li, Fu-Xiang, Wu, Ya-Min
Format Journal Article
LanguageEnglish
Published EDP Sciences, IOP Publishing and Società Italiana di Fisica 01.08.2012
Subjects
73.43.Nq
78.67.-n
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Summary:We investigate the possibility of optically manipulating the topological phase transition in a two-dimensional square lattice with staggered on-site energy and anisotropy next-nearest-neighbor hopping integral (an extended Haldane model), from the trivial insulator phase to the Chern insulator phase. Under the circular-polarization laser field, we calculate the energy spectrum of the system and obtain the Chern number phase diagram. The implications of our results are discussed.
Bibliography:ark:/67375/80W-H06HC448-4
publisher-ID:epl14798
istex:0804A5A7E79482D47FB42D437704A7D46F4C121D
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/99/47007