Soft-magnetic skyrmions induced by surface-state coupling in an intrinsic ferromagnetic topological insulator sandwich structure
A magnetic skyrmion induced on a ferromagnetic topological insulator (TI) is a real-space manifestation of the chiral spin texture in the momentum space, and can be a carrier for information processing by manipulating it in tailored structures. Here, we fabricate a sandwich structure containing two...
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| creator | Takashiro, Takuya Akiyama, Ryota Kibirev, Ivan A Matetskiy, Andrey V Nakanishi, Ryosuke Sato, Shunsuke Fukasawa, Takuro Sasaki, Taisuke Toyama, Haruko Hiwatari, Kota L Zotov, Andrey V Saranin, Alexander A Hirahara, Toru Hasegawa, Shuji |
| description | A magnetic skyrmion induced on a ferromagnetic topological insulator (TI) is a real-space manifestation of the chiral spin texture in the momentum space, and can be a carrier for information processing by manipulating it in tailored structures. Here, we fabricate a sandwich structure containing two layers of a self-assembled ferromagnetic septuple-layer TI, Mn(Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{4}\) (MnBST), separated by quintuple layers of TI, (Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{3}\) (BST), and observe skyrmions through the topological Hall effect in an intrinsic magnetic topological insulator for the first time. The thickness of BST spacer layer is crucial in controlling the coupling between the gapped topological surface states in the two MnBST layers to stabilize the skyrmion formation. The homogeneous, highly-ordered arrangement of the Mn atoms in the septuple-layer MnBST leads to a strong exchange interaction therein, which makes the skyrmions "soft magnetic". This would open an avenue towards a topologically robust rewritable magnetic memory. |
| doi_str_mv | 10.48550/arxiv.2105.13796 |
| format | Article |
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Here, we fabricate a sandwich structure containing two layers of a self-assembled ferromagnetic septuple-layer TI, Mn(Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{4}\) (MnBST), separated by quintuple layers of TI, (Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{3}\) (BST), and observe skyrmions through the topological Hall effect in an intrinsic magnetic topological insulator for the first time. The thickness of BST spacer layer is crucial in controlling the coupling between the gapped topological surface states in the two MnBST layers to stabilize the skyrmion formation. The homogeneous, highly-ordered arrangement of the Mn atoms in the septuple-layer MnBST leads to a strong exchange interaction therein, which makes the skyrmions "soft magnetic". This would open an avenue towards a topologically robust rewritable magnetic memory.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2105.13796</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Antimony ; Bismuth ; Coupling ; Data processing ; Ferromagnetism ; Hall effect ; Hypothetical particles ; Manganese ; Particle theory ; Physics - Materials Science ; Physics - Mesoscale and Nanoscale Physics ; Sandwich structures ; Self-assembly ; Tellurium ; Thickness ; Topological insulators</subject><ispartof>arXiv.org, 2021-05</ispartof><rights>2021. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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Here, we fabricate a sandwich structure containing two layers of a self-assembled ferromagnetic septuple-layer TI, Mn(Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{4}\) (MnBST), separated by quintuple layers of TI, (Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{3}\) (BST), and observe skyrmions through the topological Hall effect in an intrinsic magnetic topological insulator for the first time. The thickness of BST spacer layer is crucial in controlling the coupling between the gapped topological surface states in the two MnBST layers to stabilize the skyrmion formation. The homogeneous, highly-ordered arrangement of the Mn atoms in the septuple-layer MnBST leads to a strong exchange interaction therein, which makes the skyrmions "soft magnetic". This would open an avenue towards a topologically robust rewritable magnetic memory.</description><subject>Antimony</subject><subject>Bismuth</subject><subject>Coupling</subject><subject>Data processing</subject><subject>Ferromagnetism</subject><subject>Hall effect</subject><subject>Hypothetical particles</subject><subject>Manganese</subject><subject>Particle theory</subject><subject>Physics - Materials Science</subject><subject>Physics - Mesoscale and Nanoscale Physics</subject><subject>Sandwich structures</subject><subject>Self-assembly</subject><subject>Tellurium</subject><subject>Thickness</subject><subject>Topological insulators</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNo9kLtOAzEQRS0kJKKQD6DCEvUGP9b7KFHEI1IkCtKvJrY3OGzsxQ8gHZ-OSRDNTHPu1cxB6IqSedkIQW7Bf5mPOaNEzCmv2-oMTRjntGhKxi7QLIQdIYRVNROCT9D3i-tjsYet1dFIHN4Ofm-cDdhYlaRWeHPAIfkepC5ChKixdGkcjN1mAoPNM3pjQ8722nv33xTd6Aa3NRKGzIQ0QHQeB7Dq08hXHKJPMiavL9F5D0PQs789ReuH-_XiqVg9Py4Xd6sCBKsLWTdMUaW4lgwqqipWAqhaVMAZp_mdXoFsW0XaitegKJMbpsuW9DJLaajgU3R9qj3q6UZv9uAP3a-m7qgpEzcnYvTuPekQu51L3uabOia44Ew0Tc1_APVhbnU</recordid><startdate>20210528</startdate><enddate>20210528</enddate><creator>Takashiro, Takuya</creator><creator>Akiyama, Ryota</creator><creator>Kibirev, Ivan A</creator><creator>Matetskiy, Andrey V</creator><creator>Nakanishi, Ryosuke</creator><creator>Sato, Shunsuke</creator><creator>Fukasawa, Takuro</creator><creator>Sasaki, Taisuke</creator><creator>Toyama, Haruko</creator><creator>Hiwatari, Kota L</creator><creator>Zotov, Andrey V</creator><creator>Saranin, Alexander A</creator><creator>Hirahara, Toru</creator><creator>Hasegawa, Shuji</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20210528</creationdate><title>Soft-magnetic skyrmions induced by surface-state coupling in an intrinsic ferromagnetic topological insulator sandwich structure</title><author>Takashiro, Takuya ; Akiyama, Ryota ; Kibirev, Ivan A ; Matetskiy, Andrey V ; Nakanishi, Ryosuke ; Sato, Shunsuke ; Fukasawa, Takuro ; Sasaki, Taisuke ; Toyama, Haruko ; Hiwatari, Kota L ; Zotov, Andrey V ; Saranin, Alexander A ; Hirahara, Toru ; Hasegawa, Shuji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a527-c782d1dd3ec2a61d624aad756a3231026fdac99d09637ad12cb2e490fc4858153</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Antimony</topic><topic>Bismuth</topic><topic>Coupling</topic><topic>Data processing</topic><topic>Ferromagnetism</topic><topic>Hall effect</topic><topic>Hypothetical particles</topic><topic>Manganese</topic><topic>Particle theory</topic><topic>Physics - Materials Science</topic><topic>Physics - Mesoscale and Nanoscale Physics</topic><topic>Sandwich structures</topic><topic>Self-assembly</topic><topic>Tellurium</topic><topic>Thickness</topic><topic>Topological insulators</topic><toplevel>online_resources</toplevel><creatorcontrib>Takashiro, Takuya</creatorcontrib><creatorcontrib>Akiyama, Ryota</creatorcontrib><creatorcontrib>Kibirev, Ivan A</creatorcontrib><creatorcontrib>Matetskiy, Andrey V</creatorcontrib><creatorcontrib>Nakanishi, Ryosuke</creatorcontrib><creatorcontrib>Sato, Shunsuke</creatorcontrib><creatorcontrib>Fukasawa, Takuro</creatorcontrib><creatorcontrib>Sasaki, Taisuke</creatorcontrib><creatorcontrib>Toyama, Haruko</creatorcontrib><creatorcontrib>Hiwatari, Kota L</creatorcontrib><creatorcontrib>Zotov, Andrey V</creatorcontrib><creatorcontrib>Saranin, Alexander A</creatorcontrib><creatorcontrib>Hirahara, Toru</creatorcontrib><creatorcontrib>Hasegawa, Shuji</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takashiro, Takuya</au><au>Akiyama, Ryota</au><au>Kibirev, Ivan A</au><au>Matetskiy, Andrey V</au><au>Nakanishi, Ryosuke</au><au>Sato, Shunsuke</au><au>Fukasawa, Takuro</au><au>Sasaki, Taisuke</au><au>Toyama, Haruko</au><au>Hiwatari, Kota L</au><au>Zotov, Andrey V</au><au>Saranin, Alexander A</au><au>Hirahara, Toru</au><au>Hasegawa, Shuji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Soft-magnetic skyrmions induced by surface-state coupling in an intrinsic ferromagnetic topological insulator sandwich structure</atitle><jtitle>arXiv.org</jtitle><date>2021-05-28</date><risdate>2021</risdate><eissn>2331-8422</eissn><abstract>A magnetic skyrmion induced on a ferromagnetic topological insulator (TI) is a real-space manifestation of the chiral spin texture in the momentum space, and can be a carrier for information processing by manipulating it in tailored structures. Here, we fabricate a sandwich structure containing two layers of a self-assembled ferromagnetic septuple-layer TI, Mn(Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{4}\) (MnBST), separated by quintuple layers of TI, (Bi\(_{1-x}\)Sb\(_{x}\))\(_{2}\)Te\(_{3}\) (BST), and observe skyrmions through the topological Hall effect in an intrinsic magnetic topological insulator for the first time. The thickness of BST spacer layer is crucial in controlling the coupling between the gapped topological surface states in the two MnBST layers to stabilize the skyrmion formation. The homogeneous, highly-ordered arrangement of the Mn atoms in the septuple-layer MnBST leads to a strong exchange interaction therein, which makes the skyrmions "soft magnetic". This would open an avenue towards a topologically robust rewritable magnetic memory.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2105.13796</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Antimony Bismuth Coupling Data processing Ferromagnetism Hall effect Hypothetical particles Manganese Particle theory Physics - Materials Science Physics - Mesoscale and Nanoscale Physics Sandwich structures Self-assembly Tellurium Thickness Topological insulators |
| title | Soft-magnetic skyrmions induced by surface-state coupling in an intrinsic ferromagnetic topological insulator sandwich structure |
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