BROWSE

Related Scientist

Researcher

Daniel Leykam
복잡계 이론물리 연구단
more info

Universal momentum-to-real-space mapping of topological singularities

Cited 0 time in webofscience Cited 0 time in scopus
7 Viewed 1 Downloaded
Title
Universal momentum-to-real-space mapping of topological singularities
Author(s)
Liu X.; Xia S.; Jajtic E.; Song D.; Li D.; Tang L.; Leykam Daniel; Xu J.; Buljan H.; Chen Z.
Publication Date
2020-03
Journal
NATURE COMMUNICATIONS, v.11, no.1, pp.1586 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2020, The Author(s).Topological properties of materials are typically presented in momentum space. Here, we demonstrate a universal mapping of topological singularities from momentum to real space. By exciting Dirac-like cones in photonic honeycomb (pseudospin-1/2) and Lieb (pseudospin-1) lattices with vortex beams of topological charge l, optimally aligned with a given pseudospin state s, we directly observe topological charge conversion that follows the rule l → l + 2s. Although the mapping is observed in photonic lattices where pseudospin-orbit interaction takes place, we generalize the theory to show it is the nontrivial Berry phase winding that accounts for the conversion which persists even in systems where angular momentum is not conserved, unveiling its topological origin. Our results have direct impact on other branches of physics and material sciences beyond the 2D photonic platform: equivalent mapping occurs for 3D topological singularities such as Dirac-Weyl synthetic monopoles, achievable in mechanical, acoustic, or ultracold atomic systems, and even with electron beams
URI
https://pr.ibs.re.kr/handle/8788114/7209
ISSN
2041-1723
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
Files in This Item:
s41467-020-15374-x-2.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse