{"title":"磁性韦尔半金属 Co3Sn2S2 中光学控制畴壁产生的巨大反对称磁阻","authors":"Kohei Fujiwara, Kazuma Ogawa, Naotaka Yoshikawa, Koji Kobayashi, Kentaro Nomura, Ryo Shimano, Atsushi Tsukazaki","doi":"10.1038/s43246-024-00688-w","DOIUrl":null,"url":null,"abstract":"Domain walls (DWs) in magnetic materials host various interesting magneto-transport phenomena. Recent theoretical proposals focusing on DWs of magnetic Weyl semimetals (mWSMs) suggest the emergence of even more exotic transport owing to topologically protected Weyl domains with opposite chirality. However, techniques for controlling and characterizing DWs in mWSMs have not yet matured sufficiently to identify the distinct features of electrical conduction on DWs. Here, by adopting an optical technique to manipulate magnetic domains in mWSM Co3Sn2S2 Hall-bar devices, we discover giant antisymmetric magnetoresistance arising across a DW formed by serially connected upward- and downward-magnetized Weyl domains. This phenomenon originates from the large tangent of the Hall angle associated with the intrinsic anomalous Hall effect in the oppositely magnetized Weyl domains. Furthermore, we quantitatively evaluate DW resistance by systematically controlling the number of DWs. These results underscore the promising avenue of Weyl DW engineering for advanced research on topological magnets. Domain walls in magnetic Weyl semimetals are a source of exotic transport owing to topologically protected domains with opposite chirality. Here, utilizing an optical technique to manipulate magnetic domains in Co3Sn2S2 Hall-bar devices, the authors discover giant antisymmetric magnetoresistance across a domain wall formed by serially connected upward- and downward-magnetized Weyl domains.","PeriodicalId":10589,"journal":{"name":"Communications Materials","volume":null,"pages":null},"PeriodicalIF":7.5000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s43246-024-00688-w.pdf","citationCount":"0","resultStr":"{\"title\":\"Giant antisymmetric magnetoresistance arising across optically controlled domain walls in the magnetic Weyl semimetal Co3Sn2S2\",\"authors\":\"Kohei Fujiwara, Kazuma Ogawa, Naotaka Yoshikawa, Koji Kobayashi, Kentaro Nomura, Ryo Shimano, Atsushi Tsukazaki\",\"doi\":\"10.1038/s43246-024-00688-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Domain walls (DWs) in magnetic materials host various interesting magneto-transport phenomena. Recent theoretical proposals focusing on DWs of magnetic Weyl semimetals (mWSMs) suggest the emergence of even more exotic transport owing to topologically protected Weyl domains with opposite chirality. However, techniques for controlling and characterizing DWs in mWSMs have not yet matured sufficiently to identify the distinct features of electrical conduction on DWs. Here, by adopting an optical technique to manipulate magnetic domains in mWSM Co3Sn2S2 Hall-bar devices, we discover giant antisymmetric magnetoresistance arising across a DW formed by serially connected upward- and downward-magnetized Weyl domains. This phenomenon originates from the large tangent of the Hall angle associated with the intrinsic anomalous Hall effect in the oppositely magnetized Weyl domains. Furthermore, we quantitatively evaluate DW resistance by systematically controlling the number of DWs. These results underscore the promising avenue of Weyl DW engineering for advanced research on topological magnets. Domain walls in magnetic Weyl semimetals are a source of exotic transport owing to topologically protected domains with opposite chirality. Here, utilizing an optical technique to manipulate magnetic domains in Co3Sn2S2 Hall-bar devices, the authors discover giant antisymmetric magnetoresistance across a domain wall formed by serially connected upward- and downward-magnetized Weyl domains.\",\"PeriodicalId\":10589,\"journal\":{\"name\":\"Communications Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.5000,\"publicationDate\":\"2024-11-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.nature.com/articles/s43246-024-00688-w.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.nature.com/articles/s43246-024-00688-w\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.nature.com/articles/s43246-024-00688-w","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Giant antisymmetric magnetoresistance arising across optically controlled domain walls in the magnetic Weyl semimetal Co3Sn2S2
Domain walls (DWs) in magnetic materials host various interesting magneto-transport phenomena. Recent theoretical proposals focusing on DWs of magnetic Weyl semimetals (mWSMs) suggest the emergence of even more exotic transport owing to topologically protected Weyl domains with opposite chirality. However, techniques for controlling and characterizing DWs in mWSMs have not yet matured sufficiently to identify the distinct features of electrical conduction on DWs. Here, by adopting an optical technique to manipulate magnetic domains in mWSM Co3Sn2S2 Hall-bar devices, we discover giant antisymmetric magnetoresistance arising across a DW formed by serially connected upward- and downward-magnetized Weyl domains. This phenomenon originates from the large tangent of the Hall angle associated with the intrinsic anomalous Hall effect in the oppositely magnetized Weyl domains. Furthermore, we quantitatively evaluate DW resistance by systematically controlling the number of DWs. These results underscore the promising avenue of Weyl DW engineering for advanced research on topological magnets. Domain walls in magnetic Weyl semimetals are a source of exotic transport owing to topologically protected domains with opposite chirality. Here, utilizing an optical technique to manipulate magnetic domains in Co3Sn2S2 Hall-bar devices, the authors discover giant antisymmetric magnetoresistance across a domain wall formed by serially connected upward- and downward-magnetized Weyl domains.
期刊介绍:
Communications Materials, a selective open access journal within Nature Portfolio, is dedicated to publishing top-tier research, reviews, and commentary across all facets of materials science. The journal showcases significant advancements in specialized research areas, encompassing both fundamental and applied studies. Serving as an open access option for materials sciences, Communications Materials applies less stringent criteria for impact and significance compared to Nature-branded journals, including Nature Communications.