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Fermionic Chern insulator from twisted light with linear polarization

Bhattacharya, Utso and Chaudhary, Swati and Grass, Tobias and Johnson, Allan S. and Wall, Simon and Lewenstein, Maciej (2022) Fermionic Chern insulator from twisted light with linear polarization. Physical Review B, 105 (8). Art. No. L081406. ISSN 2469-9950. doi:10.1103/physrevb.105.l081406.

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The breaking of time-reversal symmetry is a crucial ingredient to topological bands. It can occur intrinsically in materials with magnetic order, or be induced by external fields, such as magnetic fields in quantum Hall systems or circularly polarized light fields in Floquet Chern insulators. Apart from polarization, photons can carry another degree of freedom, orbital angular momentum, through which time-reversal symmetry can be broken. In this Letter we pose the question of whether this property allows for inducing topological bands via a linearly polarized but twisted light beam. To this end we study a graphenelike model of electrons on a honeycomb lattice interacting with a twisted light field. To identify the topological behavior of the electrons, we calculate their local markers of Chern number and monitor the presence of in-gap edge states. Our results are shown to be fully analogous to the behavior found in paradigmatic models for static and driven Chern insulators, and realizing the state is experimentally straightforward. With this, our work establishes a mechanism for generating fermionic topological phases of matter that can harness the central phase singularity of an optical vortex beam.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper Information
Bhattacharya, Utso0000-0002-1447-443X
Grass, Tobias0000-0002-8163-9353
Johnson, Allan S.0000-0002-0711-708X
Wall, Simon0000-0002-6136-0224
Lewenstein, Maciej0000-0002-0210-7800
Additional Information:© 2022 American Physical Society. (Received 29 September 2020; revised 16 November 2021; accepted 31 January 2022; published 9 February 2022) We thank Gil Refael for enlightening discussions. U.B., T.G., and M.L. acknowledge the ERC AdG NOQIA, Agencia Estatal de Investigación (“Severo Ochoa” Center of Excellence CEX2019-000910-S, Plan National FIDEUA PID2019-106901GB-I00/10.13039 / 501100011033, FPI, QUANTERA MAQS PCI2019-111828-2 / 10.13039/501100011033), Spanish Ministry MINECO (National Plan 15, Grant FISICATEAMO No. FIS2016-79508-P, SEVERO OCHOA No. SEV-2015-0522, FPI), European Social Fund, Fundació Cellex, Fundació Mir-Puig, Generalitat de Catalunya (AGAUR Grant No. 2017SGR 1341, CERCA program, QuantumCAT U16-011424, cofunded by ERDF Operational Program of Catalonia 2014-2020), EU Horizon 2020 FET-OPEN OPTOLogic (Grant No. 899794), and the National Science Centre, Poland-Symfonia Grant No. 2016/20/W/ST4/00314, Marie Skłodowska-Curie Grant STREDCH No. 101029393, “La Caixa” Junior Leaders fellowships (ID100010434), and EU Horizon 2020 under Marie Skłodowska-Curie Grant Agreement No. 847648 (LCF/BQ/PI19/11690013, LCF/BQ/PI20/11760031, LCF/BQ/PR20/11770012). S.C. acknowledges support from the Institute of Quantum Information and Matter, an NSF Frontier Center funded by the Gordon and Betty Moore Foundation. T.G. acknowledges financial support from a fellowship granted by the Caixa Foundation (ID100010434, Fellowship Code No. LCF/BQ/PI19/11690013). U.B. acknowledges Cellex-ICFO-MPQ Fellowship funding. A.S.J. acknowledges funding from Marie Skodowska-Curie Grant Agreement No. 754510 (PROBIST).
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Agencia Estatal de InvestigaciónCEX2019-000910-S
Ministerio de Economía y Competitividad (MINECO)PID2019-106901GB-I00/10.13039 / 501100011033
Ministerio de Economía y Competitividad (MINECO)PCI2019-111828-2 / 10.13039/501100011033
Ministerio de Economía y Competitividad (MINECO)FIS2016-79508-P
Ministerio de Economía y Competitividad (MINECO)SEV-2015-0522
European Social FundUNSPECIFIED
Fundació CellexUNSPECIFIED
Fundació Mir-PuigUNSPECIFIED
Generalitat de Catalunya2017SGR1341
European Regional Development Fund2014-2020
European Research Council (ERC)899794
National Science Centre (Poland)2016/20/W/ST4/00314
Marie Curie Fellowship101029393
La Caixa FoundationID100010434
Marie Curie Fellowship847648
Marie Curie FellowshipLCF/BQ/PI20/11760031
Marie Curie FellowshipLCF/BQ/PI19/11690013
Marie Curie FellowshipLCF/BQ/PR20/11770012
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Marie Curie Fellowship754510
Issue or Number:8
Record Number:CaltechAUTHORS:20220209-266105000
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113346
Deposited By: George Porter
Deposited On:09 Feb 2022 23:30
Last Modified:09 Feb 2022 23:30

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