Hardcore bosonic domain walls on honeycomb lattice

Abstract

Linelike hardcore bosonic domain walls in a staggered potential on honeycomb lattice are studied using quantum Monte Carlo simulations. The phase diagrams of ribbons with zigzag and armchair domain walls are mapped, which contain superfluid and insulator phases at various fillings. In the $\rho =\frac{1}{2}$ insulator, the domain wall separates two charge-density-wave (CDW) regions with opposite Berry curvatures. Associated with the change of topological properties, superfluid transport occurs down the domain wall. The superfluid density associated with a zigzag domain wall is much larger than that of an armchair domain wall due to the different arrangements of occupied and unoccupied sites along the domain wall. Our results provide a concrete context to study bosonic topological phenomena, which may be simulated experimentally using bosonic cold atoms trapped in optical lattices.

8 pages, 9 figures; To appear in Phys. Rev. A

References in corpus (12)

• Many-Body Physics with Ultracold Gases
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Topological confinement in bilayer graphene
• A lattice of double wells for manipulating pairs of cold atoms
• Multi-Component Quantum Gases in Spin-Dependent Hexagonal Lattices
• Simulation and detection of Dirac fermions with cold atoms in an optical lattice
• An Aharonov-Bohm interferometer for determining Bloch band topology
• Generalized Directed Loop Method for Quantum Monte Carlo Simulations
• Interaction effects and quantum phase transitions in topological insulators
• Quantum Monte Carlo Study of an Interaction-Driven Band Insulator to Metal Transition
• Metallic phase in the two-dimensional ionic Hubbard model
• Chiral Bosonic Phases on the Haldane Honeycomb Lattice