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- Matter waves in atomic artificial graphene doi link

Auteur(s): Bartolo N.(Corresp.), Antezza M.(Corresp.)

(Article) Publié: Europhysics Letters (Epl), vol. 107 p.30006 (2014)
Texte intégral en Openaccess : arxiv


Ref HAL: hal-01054237_v1
DOI: 10.1209/0295-5075/107/30006
WoS: 000340780100006
Exporter : BibTex | endNote
3 Citations
Résumé:

We present a new model to realize artificial 2D lattices with cold atoms investigating the atomic artificial graphene: a 2D confined matter wave is scattered by atoms of a second species trapped around the nodes of a honeycomb optical lattice. The system allows an exact determination of the Green function, hence of the transport properties. The inter-species interaction can be tuned via the interplay between scattering length and confinements. Band structure and density of states of a periodic lattice are derived for different values of the interaction strength. Emergence and features of Dirac cones are pointed out, together with the appearance of multiple gaps and a non-dispersive and isolated flat band. Robustness against finite-size and vacancies effects is numerically investigated.