Identifying anomalous Floquet edge modes via bulk-edge correspondenceProject supported by the National Natural Science Foundation of China (Grant No. 2016YFA0301500)

Floquet engineering appears as a new protocol for designing topological states of matter, and features anomalous edge modes pinned at quasi-energy π/T with vanished topological index. We propose how to predict the anomalous edge modes via the bulk Hamiltonian in frequency space, and use Zak phase to...

Full description

Saved in:
Bibliographic Details
Published in:Chinese physics B 2020-04, Vol.29 (4)
Main Authors: Wang, Huanyu, Liu, Wuming
Format: Article
Language:English
Subjects:
bulk-edge correspondence
Floquet energineering
Zak phase
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Floquet engineering appears as a new protocol for designing topological states of matter, and features anomalous edge modes pinned at quasi-energy π/T with vanished topological index. We propose how to predict the anomalous edge modes via the bulk Hamiltonian in frequency space, and use Zak phase to quantitatively index the topological properties. The above methods are clarified by the example of time periodic Kitaev chain with chemical potential of harmonic driving and pulse driving, and topological phase transitions are manifested at different driving frequencies.
ISSN:1674-1056
DOI:10.1088/1674-1056/ab6dcb