Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/103488
Title: SU(3) topological insulators in the honeycomb lattice
Authors: Bornheimer, U.
Miniatura, Christian
Grémaud, B.
Keywords: Topological Properties
DRNTU::Science::Chemistry
Honeycomb Lattice
Issue Date: 2018
Source: Bornheimer, U., Miniatura, C., & Grémaud, B. (2018). SU(3) topological insulators in the honeycomb lattice. Physical Review A, 98(4), 043614-. doi:10.1103/PhysRevA.98.043614
Series/Report no.: Physical Review A
Abstract: We investigate realizations of topological insulators with spin-1 bosons loaded in a honeycomb optical lattice and subjected to a SU ( 3 ) spin-orbit coupling—a situation which can be realized experimentally using cold atomic gases. In this paper, we focus on the topological properties of the single-particle band structure, namely, Chern numbers (lattice with periodic boundary conditions) and edge states (lattice with strip geometry) and their connection to time-reversal symmetry and the sublattice symmetry. While SU ( 2 ) spin-orbit couplings always lead to time-reversal symmetric tight-binding models, and thereby to topologically trivial band structures, suitable SU ( 3 ) spin-orbit couplings can break time-reversal symmetry and lead to topologically nontrivial bulk band structures and to edge states in the strip geometry. In addition, we show that one can trigger a series of topological transitions (i.e., integer changes of the Chern numbers) that are specific to the geometry of the honeycomb lattice by varying a single parameter in the Hamiltonian.
URI: https://hdl.handle.net/10356/103488
http://hdl.handle.net/10220/47327
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.98.043614
Schools: School of Physical and Mathematical Sciences 
Research Centres: Institute of Advanced Studies 
Institute of Advanced Studies 
Rights: © 2018 American Physical Society. All rights reserved. This paper was published in Physical Review A and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IAS Journal Articles
SPMS Journal Articles

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