{"id":"https://openalex.org/W7213403616","doi":"https://doi.org/10.48550/arxiv.2609.17500","title":"Visualizing Berry curvature in a Floquet-Chern insulator","display_name":"Visualizing Berry curvature in a Floquet-Chern insulator","publication_year":2026,"publication_date":"2026-09-15","ids":{"openalex":"https://openalex.org/W7213403616","doi":"https://doi.org/10.48550/arxiv.2609.17500"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2609.17500","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.17500","pdf_url":"https://arxiv.org/pdf/2609.17500","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2609.17500","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5128821051","display_name":"Younsik Kim","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Kim, Younsik","raw_affiliation_strings":["Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5128845953","display_name":"Rishi Acharya","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Acharya, Rishi","raw_affiliation_strings":["Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5120268655","display_name":"Hannah E. Aguirre","orcid":"https://orcid.org/0000-0002-2951-4457","observed_orcids":["https://orcid.org/0000-0002-2951-4457"]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Aguirre, Hannah E.","raw_affiliation_strings":["Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5001077268","display_name":"Lucca Figari","orcid":"https://orcid.org/0000-0003-2611-7330","observed_orcids":["https://orcid.org/0000-0003-2611-7330"]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Figari, Lucca","raw_affiliation_strings":["Department of Materials Science and Engineering , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Materials Science and Engineering , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5019782564","display_name":"Daniel P. Shoemaker","orcid":"https://orcid.org/0000-0003-3650-7551","observed_orcids":["https://orcid.org/0000-0003-3650-7551"]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Shoemaker, Daniel P.","raw_affiliation_strings":["Department of Materials Science and Engineering , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Materials Science and Engineering , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5036154777","display_name":"Fahad Mahmood","orcid":"https://orcid.org/0000-0002-9641-3453","observed_orcids":["https://orcid.org/0000-0002-9641-3453","https://orcid.org/0009-0009-3434-2969"]},"institutions":[{"id":"https://openalex.org/I157725225","display_name":"University of Illinois Urbana-Champaign","ror":"https://ror.org/047426m28","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Mahmood, Fahad","raw_affiliation_strings":["Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physics , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]},{"raw_affiliation_string":"Materials Research Laboratory , The Grainger College of Engineering , University of Illinois Urbana-Champaign , Urbana , 61801 IL , USA","institution_ids":["https://openalex.org/I157725225"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I157725225"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10657","display_name":"Topological Materials and Phenomena","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10657","display_name":"Topological Materials and Phenomena","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10566","display_name":"Laser-Matter Interactions and Applications","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11682","display_name":"Advanced Condensed Matter Physics","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/berry-curvature","display_name":"Berry curvature","score":0.9980000257492065},{"id":"https://openalex.org/keywords/floquet-bloch-states","display_name":"Floquet-Bloch states","score":0.8619999885559082},{"id":"https://openalex.org/keywords/circularly-polarized-light","display_name":"circularly polarized light","score":0.781000018119812},{"id":"https://openalex.org/keywords/bi2se3","display_name":"Bi2Se3","score":0.75},{"id":"https://openalex.org/keywords/dirac-hamiltonian","display_name":"Dirac Hamiltonian","score":0.5649999976158142},{"id":"https://openalex.org/keywords/time-and-angle-resolved-photoemission-spectroscopy","display_name":"time- and angle-resolved photoemission spectroscopy","score":0.7839999794960022},{"id":"https://openalex.org/keywords/circular-dichroism","display_name":"circular dichroism","score":0.9020000100135803}],"concepts":[{"id":"https://openalex.org/C55649039","wikidata":"https://www.wikidata.org/wiki/Q902618","display_name":"Floquet theory","level":3,"score":0.9663000106811523},{"id":"https://openalex.org/C22448393","wikidata":"https://www.wikidata.org/wiki/Q4894840","display_name":"Berry connection and curvature","level":3,"score":0.7925999760627747},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.6796000003814697},{"id":"https://openalex.org/C24057170","wikidata":"https://www.wikidata.org/wiki/Q2497305","display_name":"Gapless playback","level":2,"score":0.6690999865531921},{"id":"https://openalex.org/C128911142","wikidata":"https://www.wikidata.org/wiki/Q1488689","display_name":"Topological insulator","level":2,"score":0.6116999983787537},{"id":"https://openalex.org/C195065555","wikidata":"https://www.wikidata.org/wiki/Q214881","display_name":"Curvature","level":2,"score":0.5216000080108643},{"id":"https://openalex.org/C159317903","wikidata":"https://www.wikidata.org/wiki/Q3198","display_name":"Photon","level":2,"score":0.4961000084877014},{"id":"https://openalex.org/C61039578","wikidata":"https://www.wikidata.org/wiki/Q604279","display_name":"Dirac (video compression format)","level":3,"score":0.48579999804496765},{"id":"https://openalex.org/C17269025","wikidata":"https://www.wikidata.org/wiki/Q3283","display_name":"Geometric phase","level":2,"score":0.4350999891757965},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.4041999876499176},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.383899986743927},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.3425999879837036},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.328000009059906},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.31049999594688416},{"id":"https://openalex.org/C79689650","wikidata":"https://www.wikidata.org/wiki/Q2387099","display_name":"Surface states","level":3,"score":0.295199990272522},{"id":"https://openalex.org/C181966813","wikidata":"https://www.wikidata.org/wiki/Q806352","display_name":"Band gap","level":2,"score":0.2921000123023987},{"id":"https://openalex.org/C2778785133","wikidata":"https://www.wikidata.org/wiki/Q25303639","display_name":"Photon energy","level":3,"score":0.2883000075817108},{"id":"https://openalex.org/C2778114796","wikidata":"https://www.wikidata.org/wiki/Q7575194","display_name":"Spectral gap","level":2,"score":0.274399995803833},{"id":"https://openalex.org/C17020691","wikidata":"https://www.wikidata.org/wiki/Q139677","display_name":"Operator (biology)","level":5,"score":0.2728999853134155},{"id":"https://openalex.org/C2776196297","wikidata":"https://www.wikidata.org/wiki/Q17138781","display_name":"Twist","level":2,"score":0.26910001039505005}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2609.17500","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.17500","pdf_url":"https://arxiv.org/pdf/2609.17500","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2609.17500","doi":"https://doi.org/10.48550/arxiv.2609.17500","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2609.17500","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2609.17500","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.17500","pdf_url":"https://arxiv.org/pdf/2609.17500","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G274254545","display_name":"Novel Double Angle-Resolved Photoemission Spectrometer to Probe Electron Correlations in Quantum Materials","funder_award_id":"GBMF11069","funder_id":"https://openalex.org/F4320306202","funder_display_name":"Gordon and Betty Moore Foundation"},{"id":"https://openalex.org/G8230407200","display_name":"CAREER: Nonlinear THz electrodynamics of spin quasiparticles","funder_award_id":"2144256","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"},{"id":"https://openalex.org/F4320306084","display_name":"U.S. Department of Energy","ror":"https://ror.org/01bj3aw27"},{"id":"https://openalex.org/F4320306202","display_name":"Gordon and Betty Moore Foundation","ror":"https://ror.org/006wxqw41"},{"id":"https://openalex.org/F4320337367","display_name":"Division of Materials Research","ror":"https://ror.org/01pc7k308"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7213403616.pdf","grobid_xml":"https://content.openalex.org/works/W7213403616.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2085532591","https://openalex.org/W6908669919","https://openalex.org/W2605988885","https://openalex.org/W4404845403","https://openalex.org/W1903493486","https://openalex.org/W4408054411","https://openalex.org/W4402268719","https://openalex.org/W2790232678","https://openalex.org/W4413577968","https://openalex.org/W2760579941"],"abstract_inverted_index":{"Circularly":[0],"polarized":[1],"light":[2],"can":[3,119],"open":[4],"a":[5,9,14,95,134],"topological":[6],"gap":[7,108],"in":[8,90],"gapless":[10],"Dirac":[11,98,107],"system,":[12],"creating":[13],"Floquet-Chern":[15],"insulator.":[16],"However,":[17],"its":[18],"Berry":[19,40],"curvature":[20,41],"has":[21],"not":[22],"been":[23],"directly":[24],"resolved.":[25],"Here":[26],"we":[27,60],"use":[28],"circular-dichroism":[29],"time-":[30],"and":[31,84,104,140],"angle-resolved":[32],"photoemission":[33],"spectroscopy":[34],"(Tr-ARPES)":[35],"to":[36],"map":[37],"the":[38,46,57,62,80,101,105,112],"light-induced":[39,138],"of":[42,48,56,137],"Floquet-Bloch":[43],"states":[44],"on":[45],"surface":[47],"Bi$_2$Se$_3$.":[49],"By":[50],"comparing":[51],"spectra":[52],"for":[53,94],"opposite":[54],"helicities":[55],"mid-infrared":[58],"pump,":[59],"isolate":[61],"induced":[63,102],"geometric":[64],"response.":[65],"We":[66],"observe":[67],"alternating-sign":[68],"Berry-curvature":[69,103,131],"features":[70],"at":[71,76],"Floquet":[72,106,124,142],"gaps":[73],"that":[74,116],"repeat":[75],"intervals":[77],"set":[78],"by":[79],"pump":[81,87],"photon":[82],"energy":[83],"redistribute":[85],"with":[86,92],"field":[88],"strength":[89],"agreement":[91],"calculations":[93],"periodically":[96],"driven":[97],"Hamiltonian.":[99],"Both":[100],"decay":[109],"faster":[110],"than":[111],"replica":[113],"intensity,":[114],"showing":[115],"spectral":[117],"replicas":[118],"persist":[120],"even":[121],"after":[122],"coherent":[123,141],"hybridization":[125],"weakens.":[126],"These":[127],"results":[128],"establish":[129],"momentum-resolved":[130],"mapping":[132],"as":[133],"direct":[135],"probe":[136],"topology":[139],"band":[143],"formation.":[144]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2026-09-17T00:00:00"}
