ITP OpenIR  > SCI期刊论文
Zhou, Longwen1; Du, Qianqian
Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder
Source PublicationPHYSICAL REVIEW A
Language英语
KeywordCHIRAL-SYMMETRY STATES SURFACE
AbstractFloquet engineering has the advantage of generating new phases with large topological invariants and many edge states by simple driving protocols. In this work, we propose an approach to obtain Floquet topological phases with fourfold-degenerate edge states and even-integer topological invariants in a spin-1/2 Creutz ladder model, which is realizable in current experiments. Putting the ladder under periodic quenches, we found rich Floquet topological phases in the system, which belong to the symmetry class CII. Each of these phases is characterized by a pair of even integer topological invariants (w(0), w(pi)) is an element of 2Z x 2Z, which can take arbitrarily large values with the increase of driving parameters. Under the open boundary condition, we further obtain multiple quartets of topological edge states with quasienergies zero and pi in the system. Their numbers are determined by the bulk topological invariants (w(0), w(pi)) due to the bulk-edge correspondence. Finally, we propose a way to dynamically probe the Floquet topological phases in our system by measuring a generalized mean chiral displacement. Our findings thus enrich the family of Floquet topological matter, and put forward the detection of their topological properties.
2020
ISSN2469-9926
Volume101Issue:3Pages:33607
Cooperation Status国内
Subject AreaOptics ; Physics
MOST Discipline CatalogueOptics ; Physics, Atomic, Molecular & Chemical
DOI10.1103/PhysRevA.101.033607
Indexed BySCIE
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/26985
CollectionSCI期刊论文
Affiliation1.Ocean Univ China, Dept Phys, Coll Informat Sci & Engn, Qingdao 266100, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Longwen,Du, Qianqian. Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder[J]. PHYSICAL REVIEW A,2020,101(3):33607.
APA Zhou, Longwen,&Du, Qianqian.(2020).Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder.PHYSICAL REVIEW A,101(3),33607.
MLA Zhou, Longwen,et al."Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder".PHYSICAL REVIEW A 101.3(2020):33607.
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