%0 Journal Article
%T Matter waves in atomic artificial graphene
%+ Laboratoire Charles Coulomb (L2C)
%A Bartolo, Nicola
%A Antezza, Mauro
%< avec comité de lecture
%Z L2C:14-120
%@ 0295-5075
%J EPL - Europhysics Letters
%I European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing
%V 107
%N 3
%P 30006
%8 2014-08-05
%D 2014
%R 10.1209/0295-5075/107/30006
%Z Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]
%Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X 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.
%G English
%2 https://hal.science/hal-01054237/document
%2 https://hal.science/hal-01054237/file/25-EPL_107_30006_2014post-print.pdf
%L hal-01054237
%U https://hal.science/hal-01054237
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021