Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/82735
Title: Nodal Brillouin-zone boundary from folding a Chern insulator
Authors: Lang, Li-Jun
Zhang, Shao-Liang
Zhou, Qi
Keywords: Topology
Brillouin Zone Boundary
Issue Date: 2017
Source: Lang, L.-J., Zhang, S.-L., & Zhou, Q. (2017). Nodal Brillouin-zone boundary from folding a Chern insulator. Physical Review A, 95(5), 053615-.
Series/Report no.: Physical Review A
Abstract: A Chern insulator is a building block of many topological quantum matters. Here, we discuss a nonsymmorphic Chern insulator, which preserves the nonsymmorphic symmetry and breaks the time-reversal symmetry. It consists of two half-filled Chern insulators, and the bulk energy spectrum is obtained from folding that of either Chern insulator. Such folding gives rise to a nodal boundary of the Brillouin zone, which is protected by the nonsymmorphic symmetries and other lattice symmetries of the system. It also provides one a natural platform to explore the non-Abelian Berry curvature and the resultant quantum phenomena. Moreover, the interplay between nonsymmorphic symmetries and the broken time-reversal symmetry leads to intriguing properties absent in ordinary Chern insulators. An additional degree of freedom, the parity of the nonsymmorphic symmetry, needs to be introduced for describing the topological pumping.
URI: https://hdl.handle.net/10356/82735
http://hdl.handle.net/10220/45035
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.95.053615
Rights: © 2017 American Physical Society (APS). This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevA.95.053615]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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