DOI: 10.1016/j.scib.2021.04.006
论文题名: Direct dynamical characterization of higher-order topological phases with nested band inversion surfaces
作者: Li L. ; Zhu W. ; Gong J.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期: 15 起始页码: 1502
结束页码: 1510
语种: 英语
中文关键词: Band inversion surface
; Dimension reduction
; Higher-order topology
; Quench dynamics
; Topological quantum phases
英文关键词: Algebra
; Dynamics
; Hamiltonians
; Textures
; Band inversion
; Band inversion surface
; Dimension reduction
; Dynamical characterization
; High-order
; High-order topology
; Higher-order
; Quench dynamic
; Topological phase
; Topological quantum phase
; Topology
英文摘要: Higher-order topological phases (HOTPs) are systems with topologically protected in-gap boundary states localized at their (d-n)-dimensional boundaries, with d the system dimension and n the order of the topology. This work proposes a dynamics-based characterization of one large class of Z-type HOTPs without specifically relying on any crystalline symmetry considerations. The key element of our innovative approach is to connect quantum quench dynamics with nested configurations of the so-called band inversion surfaces (BISs) of momentum-space Hamiltonians as a sum of operators from the Clifford algebra (a condition that can be partially relaxed), thereby making it possible to dynamically detect each and every order of topology on an equal footing. Given that experiments on synthetic topological matter can directly measure the winding of certain pseudospin texture to determine topological features of BISs, the topological invariants defined through nested BISs are all within reach of ongoing experiments. Further, the necessity of having nested BISs in defining higher-order topology offers a unique perspective to investigate and engineer higher-order topological phase transitions. © 2021 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170309
Appears in Collections: 气候变化与战略
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作者单位: Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing & School of Physics and Astronomy, Sun Yat-sen University (Zhuhai Campus), Zhuhai, 519082, China; Department of Physics, National University of Singapore, Singapore, 117542, Singapore
Recommended Citation:
Li L.,Zhu W.,Gong J.. Direct dynamical characterization of higher-order topological phases with nested band inversion surfaces[J]. Science Bulletin,2021-01-01,66(15)