Massless Dirac fermions in a square optical lattice Export

@article{citeulike:4388537, abstract = {We propose a scheme to simulate and observe massless Dirac fermions with cold atoms in a square optical lattice. A U(1) adiabatic phase is created by two laser beams for the tunneling of atoms between neighbor lattice sites. Properly adjusting the tunneling phase, we find that the energy spectrum has conical points in per Brillouin zone where band crossing occurs. Near these crossing points the quasiparticles and quasiholes can be considered as massless Dirac fermions. Furthermore, the anisotropic effects of massless Dirac fermions are obtained in the present square lattice model. The Dirac fermions as well as the anisotropic behaviors realized in our system can be experimentally detected with the Bragg spectroscopy technique.}, author = {Hou, Jing M. and Yang, Wen X. and Liu, Xiong J.}, citeulike-article-id = {4388537}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLRAAN000079000004043621000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRA/v79/e043621}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevA.79.043621}, doi = {10.1103/PhysRevA.79.043621}, journal = {Physical Review A (Atomic, Molecular, and Optical Physics)}, keywords = {graphene, lattice}, number = {4}, pages = {043621+}, posted-at = {2009-06-11 19:32:05}, priority = {0}, publisher = {APS}, title = {Massless Dirac fermions in a square optical lattice}, url = {http://dx.doi.org/10.1103/PhysRevA.79.043621}, volume = {79}, year = {2009} }

TY - JOUR ID - citeulike:4388537 L3 - citeulike-article-id:4388537 N2 - We propose a scheme to simulate and observe massless Dirac fermions with cold atoms in a square optical lattice. A U(1) adiabatic phase is created by two laser beams for the tunneling of atoms between neighbor lattice sites. Properly adjusting the tunneling phase, we find that the energy spectrum has conical points in per Brillouin zone where band crossing occurs. Near these crossing points the quasiparticles and quasiholes can be considered as massless Dirac fermions. Furthermore, the anisotropic effects of massless Dirac fermions are obtained in the present square lattice model. The Dirac fermions as well as the anisotropic behaviors realized in our system can be experimentally detected with the Bragg spectroscopy technique. IS - 4 JF - Physical Review A (Atomic, Molecular, and Optical Physics) TI - Massless Dirac fermions in a square optical lattice PB - APS VL - 79 SP - 043621 KW - graphene KW - lattice AU - Hou, Jing AU - Yang, Wen AU - Liu, Xiong PY - 2009/// UR - http://dx.doi.org/10.1103/PhysRevA.79.043621 ER -