Matter waves in atomic artificial graphene
Anno: 2014
Autori: Bartolo N., Antezza M.
Affiliazione autori: Univ Montpellier 2, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France; CNRS, Lab Charles Coulomb, UMR 5221, F-34095 Montpellier, France; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; Inst Univ France, F-75005 Paris, France.
Abstract: 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. Copyright (C) EPLA, 2014
Giornale/Rivista: EUROPHYSICS LETTERS
Volume: 107 (3) Da Pagina: 30006-1 A: 30006-6
Parole chiavi: ElectronsDOI: 10.1209/0295-5075/107/30006Citazioni: 3dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui
