English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spin-orbit-induced topological flat bands in line and split graphs of bipartite lattices

Ma, D.-S., Xu, Y., Chiu, C. S., Regnault, N., Houck, A. A., Song, Z., et al. (2020). Spin-orbit-induced topological flat bands in line and split graphs of bipartite lattices. Physical Review Letters, 125(26): 266403. doi:10.1103/PhysRevLett.125.266403.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
PhysRevLett.125.266403.pdf (Publisher version), 421KB
 
File Permalink:
-
Name:
PhysRevLett.125.266403.pdf
Description:
Archivkopie
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show
hide
Locator:
https://doi.org/10.1103/PhysRevLett.125.266403 (Publisher version)
Description:
-

Creators

show
hide
 Creators:
Ma, Da-Shuai1, Author
Xu, Yuanfeng2, Author              
Chiu, Christie S1, Author
Regnault, Nicolas1, Author
Houck, Andrew A.1, Author
Song, Zhida1, Author
Bernevig, B. Andrei1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              

Content

show
hide
Free keywords: -
 Abstract: Topological flat bands, such as the band in twisted bilayer graphene, are becoming a promising platform to study topics such as correlation physics, superconductivity, and transport. In this Letter, we introduce a generic approach to construct two-dimensional (2D) topological quasiflat bands from line graphs and split graphs of bipartite lattices. A line graph or split graph of a bipartite lattice exhibits a set of flat bands and a set of dispersive bands. The flat band connects to the dispersive bands through a degenerate state at some momentum. We find that, with spin-orbit coupling (SOC), the flat band becomes quasiflat and gapped from the dispersive bands. By studying a series of specific line graphs and split graphs of bipartite lattices, we find that (i) if the flat band (without SOC) has inversion or C2 symmetry and is nondegenerate, then the resulting quasiflat band must be topologically nontrivial, and (ii) if the flat band (without SOC) is degenerate, then there exists a SOC potential such that the resulting quasiflat band is topologically nontrivial. This generic mechanism serves as a paradigm for finding topological quasiflat bands in 2D crystalline materials and metamaterials.

Details

show
hide
Language(s):
 Dates: 2020-12-31
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: P14001
DOI: 10.1103/PhysRevLett.125.266403
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 (26) Sequence Number: 266403 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1