Volume 84, Number 6, December 2008
|Number of page(s)||5|
|Published online||12 January 2009|
Extended Haldane's model and its simulation with ultracold atoms
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University Nanjing 210093, China
Corresponding author: email@example.com
Accepted: 12 November 2008
Haldane's model is extended to a square lattice related close to the so-called state, in which the on-site energy is staggered and the next-nearest-neighbor hopping is anisotropic. From the phase diagram obtained, two types of phases are found, i.e., the normal insulator with Chern number and the Hall insulator with C = ± 1. We propose a way of simulating this model with cold atoms in an optical lattice. By measuring the atomic density profile, one can detect this phase diagram.
PACS: 05.30.Fk – Fermion systems and electron gas / 73.43.-f – Quantum Hall effects / 42.50.Wk – Mechanical effects of light on material media, microstructures and particles
© EPLA, 2008
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