2014/08/01 by Nicola Bartolo, Mauro Antezza · 3 citations
Chemistry · Physics and Astronomy · #Bloch wave #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Graphene #Lattice (music) #Matter wave #Optical lattice #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #Robustness (evolution) #Scattering #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.quant-gas
paper · pdf · doi:10.1209/0295-5075/107/30006
published in Europhysics Letters (EPL) 107(3), 30006 (Institute of Physics) · 6 pages, 6 figures
openalex publication_date 2014/08/01 · arxiv created 2014/08/26 · arxiv updated 2014/08/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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.