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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SU(3) topological insulators in the honeycomb lattice.pdf | 2.26 MB | Adobe PDF | View/Open |
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