Topological flat bands in frustrated kagome lattice CoSn

Mingu Kang; Shiang Fang; Linda Ye; Hoi Chun Po; Jonathan Denlinger; Chris Jozwiak; Aaron Bostwick; Eli Rotenberg; Efthimios Kaxiras; Joseph G. Checkelsky; Riccardo Comin

doi:10.1038/s41467-020-17465-1

Nature Communications (Aug 2020)

Topological flat bands in frustrated kagome lattice CoSn

Mingu Kang,
Shiang Fang,
Linda Ye,
Hoi Chun Po,
Jonathan Denlinger,
Chris Jozwiak,
Aaron Bostwick,
Eli Rotenberg,
Efthimios Kaxiras,
Joseph G. Checkelsky,
Riccardo Comin

Affiliations

Mingu Kang: Department of Physics, Massachusetts Institute of Technology
Shiang Fang: Department of Physics, Harvard University
Linda Ye: Department of Physics, Massachusetts Institute of Technology
Hoi Chun Po: Department of Physics, Massachusetts Institute of Technology
Jonathan Denlinger: Advanced Light Source, E. O. Lawrence Berkeley National Laboratory
Chris Jozwiak: Advanced Light Source, E. O. Lawrence Berkeley National Laboratory
Aaron Bostwick: Advanced Light Source, E. O. Lawrence Berkeley National Laboratory
Eli Rotenberg: Advanced Light Source, E. O. Lawrence Berkeley National Laboratory
Efthimios Kaxiras: Department of Physics, Harvard University
Joseph G. Checkelsky: Department of Physics, Massachusetts Institute of Technology
Riccardo Comin: Department of Physics, Massachusetts Institute of Technology

DOI: https://doi.org/10.1038/s41467-020-17465-1
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 9

Abstract

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The experimental realization of lattice-born flat bands with nontrivial topology has been elusive. Here, the authors observe topological flat bands near the Fermi level in a kagome metal CoSn, with flat bands as well as Dirac bands originating from 3d orbitals in a frustrated kagome geometry.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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