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Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films
Interplay of magnetism and electronic band topology in unconventional magnets enables the creation and fine control of novel electronic phenomena. In this work, we use scanning tunneling microscopy and spectroscopy to study thin films of a prototypical kagome magnet Fe 3 Sn 2 . Our experiments revea...
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| Published in: | npj quantum materials 2022-11, Vol.7 (1), p.1-7, Article 109 |
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| creator | Ren, Zheng Li, Hong Sharma, Shrinkhala Bhattarai, Dipak Zhao, He Rachmilowitz, Bryan Bahrami, Faranak Tafti, Fazel Fang, Shiang Ghimire, Madhav Prasad Wang, Ziqiang Zeljkovic, Ilija |
| description | Interplay of magnetism and electronic band topology in unconventional magnets enables the creation and fine control of novel electronic phenomena. In this work, we use scanning tunneling microscopy and spectroscopy to study thin films of a prototypical kagome magnet Fe
3
Sn
2
. Our experiments reveal an unusually large number of densely-spaced spectroscopic features straddling the Fermi level. These are consistent with signatures of low-energy Weyl fermions and associated topological Fermi arc surface states predicted by theory. By measuring their response as a function of magnetic field, we discover a pronounced evolution in energy tied to the magnetization direction. Electron scattering and interference imaging further demonstrates the tunable nature of a subset of related electronic states. Our experiments provide a direct visualization of how in-situ spin reorientation drives changes in the electronic density of states of the Weyl fermion band structure. Combined with previous reports of massive Dirac fermions, flat bands, and electronic nematicity, our work establishes Fe
3
Sn
2
as an interesting platform that harbors an extraordinarily wide array of topological and correlated electron phenomena. |
| doi_str_mv | 10.1038/s41535-022-00521-y |
| format | article |
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3
Sn
2
. Our experiments reveal an unusually large number of densely-spaced spectroscopic features straddling the Fermi level. These are consistent with signatures of low-energy Weyl fermions and associated topological Fermi arc surface states predicted by theory. By measuring their response as a function of magnetic field, we discover a pronounced evolution in energy tied to the magnetization direction. Electron scattering and interference imaging further demonstrates the tunable nature of a subset of related electronic states. Our experiments provide a direct visualization of how in-situ spin reorientation drives changes in the electronic density of states of the Weyl fermion band structure. Combined with previous reports of massive Dirac fermions, flat bands, and electronic nematicity, our work establishes Fe
3
Sn
2
as an interesting platform that harbors an extraordinarily wide array of topological and correlated electron phenomena.</description><identifier>ISSN: 2397-4648</identifier><identifier>EISSN: 2397-4648</identifier><identifier>DOI: 10.1038/s41535-022-00521-y</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>639/301/119/544 ; 639/766/119/2792 ; Banded structure ; Condensed Matter Physics ; Electron spin ; Electron states ; Fermions ; Magnetism ; Magnets ; MATERIALS SCIENCE ; Physics ; Physics and Astronomy ; Quantum Physics ; Scanning tunneling microscopy ; Structural Materials ; Surfaces and Interfaces ; Surfaces, interfaces and thin films ; Thin Films ; Topological matter ; Topology</subject><ispartof>npj quantum materials, 2022-11, Vol.7 (1), p.1-7, Article 109</ispartof><rights>The Author(s) 2022</rights><rights>The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c456t-b16c817a7263761a2d250b5fc5d9171358f95600db8f637b69e89521c7aa94963</citedby><cites>FETCH-LOGICAL-c456t-b16c817a7263761a2d250b5fc5d9171358f95600db8f637b69e89521c7aa94963</cites><orcidid>0000-0001-9966-2140 ; 0000-0002-9412-6426 ; 0000-0001-5679-8355 ; 0000-0002-2422-8216 ; 0000-0002-5723-4604 ; 0000000224228216 ; 0000000294126426 ; 0000000156798355 ; 0000000257234604 ; 0000000199662140</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/2736504652?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>230,314,780,784,885,25753,27924,27925,37012,44590</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/2419534$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Ren, Zheng</creatorcontrib><creatorcontrib>Li, Hong</creatorcontrib><creatorcontrib>Sharma, Shrinkhala</creatorcontrib><creatorcontrib>Bhattarai, Dipak</creatorcontrib><creatorcontrib>Zhao, He</creatorcontrib><creatorcontrib>Rachmilowitz, Bryan</creatorcontrib><creatorcontrib>Bahrami, Faranak</creatorcontrib><creatorcontrib>Tafti, Fazel</creatorcontrib><creatorcontrib>Fang, Shiang</creatorcontrib><creatorcontrib>Ghimire, Madhav Prasad</creatorcontrib><creatorcontrib>Wang, Ziqiang</creatorcontrib><creatorcontrib>Zeljkovic, Ilija</creatorcontrib><creatorcontrib>Boston College, Chestnut Hill, MA (United States)</creatorcontrib><title>Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films</title><title>npj quantum materials</title><addtitle>npj Quantum Mater</addtitle><description>Interplay of magnetism and electronic band topology in unconventional magnets enables the creation and fine control of novel electronic phenomena. In this work, we use scanning tunneling microscopy and spectroscopy to study thin films of a prototypical kagome magnet Fe
3
Sn
2
. Our experiments reveal an unusually large number of densely-spaced spectroscopic features straddling the Fermi level. These are consistent with signatures of low-energy Weyl fermions and associated topological Fermi arc surface states predicted by theory. By measuring their response as a function of magnetic field, we discover a pronounced evolution in energy tied to the magnetization direction. Electron scattering and interference imaging further demonstrates the tunable nature of a subset of related electronic states. Our experiments provide a direct visualization of how in-situ spin reorientation drives changes in the electronic density of states of the Weyl fermion band structure. Combined with previous reports of massive Dirac fermions, flat bands, and electronic nematicity, our work establishes Fe
3
Sn
2
as an interesting platform that harbors an extraordinarily wide array of topological and correlated electron phenomena.</description><subject>639/301/119/544</subject><subject>639/766/119/2792</subject><subject>Banded structure</subject><subject>Condensed Matter Physics</subject><subject>Electron spin</subject><subject>Electron states</subject><subject>Fermions</subject><subject>Magnetism</subject><subject>Magnets</subject><subject>MATERIALS SCIENCE</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Quantum Physics</subject><subject>Scanning tunneling microscopy</subject><subject>Structural Materials</subject><subject>Surfaces and Interfaces</subject><subject>Surfaces, interfaces and thin films</subject><subject>Thin Films</subject><subject>Topological matter</subject><subject>Topology</subject><issn>2397-4648</issn><issn>2397-4648</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>PIMPY</sourceid><sourceid>DOA</sourceid><recordid>eNp9kU1LxDAQhosouKh_wFPQczXfTY7i58KCgorHkKbJbtc20SR72H9vtKKePM0w87wvM7xVdYzgGYJEnCeKGGE1xLiGkGFUb3eqGSayqSmnYvdPv18dpbSGEGKEBOV8Vl09DDavQtQgOJA3XreDBS92OwBn49gHn0DvwatehtGCUS-9zeDGkkePQV6VjeuHMR1We04PyR5914Pq-eb66fKuXtzfzi8vFrWhjOe6RdwI1OgGc9JwpHGHGWyZM6yTqEGECScZh7BrhStEy6UVsvxjGq0llZwcVPPJtwt6rd5iP-q4VUH36msQ4lLpmHszWEWpQQ4aJzvJKRVadEzo1jjjMBTcuOJ1MnmFlHuVTJ-tWZngvTVZYYokI7RApxP0FsP7xqas1mETfflR4YZwBilnuFB4okwMKUXrfk5DUH0mpKaEVElIfSWktkVEJlEqsF_a-Gv9j-oDa7KQ-A</recordid><startdate>20221115</startdate><enddate>20221115</enddate><creator>Ren, Zheng</creator><creator>Li, Hong</creator><creator>Sharma, Shrinkhala</creator><creator>Bhattarai, Dipak</creator><creator>Zhao, He</creator><creator>Rachmilowitz, Bryan</creator><creator>Bahrami, Faranak</creator><creator>Tafti, Fazel</creator><creator>Fang, Shiang</creator><creator>Ghimire, Madhav Prasad</creator><creator>Wang, Ziqiang</creator><creator>Zeljkovic, Ilija</creator><general>Nature Publishing Group UK</general><general>Nature Publishing Group</general><general>Nature Portfolio</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>OIOZB</scope><scope>OTOTI</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0001-9966-2140</orcidid><orcidid>https://orcid.org/0000-0002-9412-6426</orcidid><orcidid>https://orcid.org/0000-0001-5679-8355</orcidid><orcidid>https://orcid.org/0000-0002-2422-8216</orcidid><orcidid>https://orcid.org/0000-0002-5723-4604</orcidid><orcidid>https://orcid.org/0000000224228216</orcidid><orcidid>https://orcid.org/0000000294126426</orcidid><orcidid>https://orcid.org/0000000156798355</orcidid><orcidid>https://orcid.org/0000000257234604</orcidid><orcidid>https://orcid.org/0000000199662140</orcidid></search><sort><creationdate>20221115</creationdate><title>Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films</title><author>Ren, Zheng ; 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In this work, we use scanning tunneling microscopy and spectroscopy to study thin films of a prototypical kagome magnet Fe
3
Sn
2
. Our experiments reveal an unusually large number of densely-spaced spectroscopic features straddling the Fermi level. These are consistent with signatures of low-energy Weyl fermions and associated topological Fermi arc surface states predicted by theory. By measuring their response as a function of magnetic field, we discover a pronounced evolution in energy tied to the magnetization direction. Electron scattering and interference imaging further demonstrates the tunable nature of a subset of related electronic states. Our experiments provide a direct visualization of how in-situ spin reorientation drives changes in the electronic density of states of the Weyl fermion band structure. Combined with previous reports of massive Dirac fermions, flat bands, and electronic nematicity, our work establishes Fe
3
Sn
2
as an interesting platform that harbors an extraordinarily wide array of topological and correlated electron phenomena.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/s41535-022-00521-y</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0001-9966-2140</orcidid><orcidid>https://orcid.org/0000-0002-9412-6426</orcidid><orcidid>https://orcid.org/0000-0001-5679-8355</orcidid><orcidid>https://orcid.org/0000-0002-2422-8216</orcidid><orcidid>https://orcid.org/0000-0002-5723-4604</orcidid><orcidid>https://orcid.org/0000000224228216</orcidid><orcidid>https://orcid.org/0000000294126426</orcidid><orcidid>https://orcid.org/0000000156798355</orcidid><orcidid>https://orcid.org/0000000257234604</orcidid><orcidid>https://orcid.org/0000000199662140</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 639/301/119/544 639/766/119/2792 Banded structure Condensed Matter Physics Electron spin Electron states Fermions Magnetism Magnets MATERIALS SCIENCE Physics Physics and Astronomy Quantum Physics Scanning tunneling microscopy Structural Materials Surfaces and Interfaces Surfaces, interfaces and thin films Thin Films Topological matter Topology |
| title | Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films |
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