A tight binding model for quantum spin Hall effect on triangular optical lattice
Abstract: Topological insulators (TIs) are insulating in the bulk but have metallic states on their boundaries. It is widely acknowledged that the cold atomic systems are ideal systems to simulate solid-state phenomena in a controlled way. We propose a tight binding model for the quantum spin Hall system on triangular optical lattice and we determined the edge state spectrum which contains gap traversing states as the hallmark of Z2 topological insulator. The advantage of this system is the possibility of implementing it in the fermionic ultracold atomic system.