Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3
Abstract Covalent 2D magnets such as Cr2Te3, which feature self‐intercalated magnetic cations located between monolayers of transition‐metal dichalcogenide material, offer a unique platform for controlling magnetic order and spin texture, enabling new potential applications for spintronic devices. H...
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Wiley
2025-01-01
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| Online Access: | https://doi.org/10.1002/advs.202407625 |
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| author | Keke He Mengying Bian Samuel D. Seddon Koushik Jagadish Andrea Mucchietto He Ren Erik Kirstein Reza Asadi Jaeil Bai Chao Yao Sheng Pan Jie‐Xiang Yu Peter Milde Chang Huai Haolei Hui Jiadong Zang Renat Sabirianov Xuemei M. Cheng Guoxing Miao Hui Xing Yu‐Tsun Shao Scott A. Crooker Lukas Eng Yanglong Hou Jonathan P. Bird Hao Zeng |
| author_facet | Keke He Mengying Bian Samuel D. Seddon Koushik Jagadish Andrea Mucchietto He Ren Erik Kirstein Reza Asadi Jaeil Bai Chao Yao Sheng Pan Jie‐Xiang Yu Peter Milde Chang Huai Haolei Hui Jiadong Zang Renat Sabirianov Xuemei M. Cheng Guoxing Miao Hui Xing Yu‐Tsun Shao Scott A. Crooker Lukas Eng Yanglong Hou Jonathan P. Bird Hao Zeng |
| author_sort | Keke He |
| collection | DOAJ |
| description | Abstract Covalent 2D magnets such as Cr2Te3, which feature self‐intercalated magnetic cations located between monolayers of transition‐metal dichalcogenide material, offer a unique platform for controlling magnetic order and spin texture, enabling new potential applications for spintronic devices. Here, it is demonstrated that the unconventional anomalous Hall effect (AHE) in Cr2Te3, characterized by additional humps and dips near the coercive field in AHE hysteresis, originates from an intrinsic mechanism dictated by the self‐intercalation. This mechanism is distinctly different from previously proposed mechanisms such as topological Hall effect, or two‐channel AHE arising from spatial inhomogeneities. Crucially, multiple Weyl‐like nodes emerge in the electronic band structure due to strong spin‐orbit coupling, whose positions relative to the Fermi level is sensitively modulated by the canting angles of the self‐intercalated Cr cations. These nodes contribute strongly to the Berry curvature and AHE conductivity. This component competes with the contribution from bands that are less affected by the self‐intercalation, resulting in a sign change in AHE with temperature and the emergence of additional humps and dips. The findings provide compelling evidence for the intrinsic origin of the unconventional AHE in Cr2Te3 and further establish self‐intercalation as a control knob for engineering AHE in complex magnets. |
| format | Article |
| id | doaj-art-3103dce7ef004f2691ce7f61a6bb4c80 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-3103dce7ef004f2691ce7f61a6bb4c802025-01-13T15:29:43ZengWileyAdvanced Science2198-38442025-01-01122n/an/a10.1002/advs.202407625Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3Keke He0Mengying Bian1Samuel D. Seddon2Koushik Jagadish3Andrea Mucchietto4He Ren5Erik Kirstein6Reza Asadi7Jaeil Bai8Chao Yao9Sheng Pan10Jie‐Xiang Yu11Peter Milde12Chang Huai13Haolei Hui14Jiadong Zang15Renat Sabirianov16Xuemei M. Cheng17Guoxing Miao18Hui Xing19Yu‐Tsun Shao20Scott A. Crooker21Lukas Eng22Yanglong Hou23Jonathan P. Bird24Hao Zeng25Department of Physics University at Buffalo The State University of New York BuffaloNY 14226 USADepartment of Physics University at Buffalo The State University of New York BuffaloNY 14226 USAInstitute of Applied Physics Technical University of Dresden 01187 Dresden GermanyMork Family Department of Chemical Engineering and Materials Science University of Southern California Los AngelesCA 90089 USANational High Magnetic Field Laboratory Los Alamos National Lab Los AlamosNM 87545 USADepartment of Electrical and Computer Engineering Institute for Quantum Computing University of Waterloo Ontario N2L3G1 CanadaNational High Magnetic Field Laboratory Los Alamos National Lab Los AlamosNM 87545 USADepartment of Electrical and Computer Engineering Institute for Quantum Computing University of Waterloo Ontario N2L3G1 CanadaDepartment of Physics University of Nebraska‐Omaha OmahaNE 68182 USAKey Laboratory of Artificial Structures and Quantum Control Shanghai Center for Complex Physics School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaSchool of Physical science and Technology Soochow University Suzhou 215006 ChinaSchool of Physical science and Technology Soochow University Suzhou 215006 ChinaInstitute of Applied Physics Technical University of Dresden 01187 Dresden GermanyDepartment of Physics University at Buffalo The State University of New York BuffaloNY 14226 USADepartment of Physics University at Buffalo The State University of New York BuffaloNY 14226 USADepartment of Physics and Astronomy University of New Hampshire DurhamNH 03824 USADepartment of Physics University of Nebraska‐Omaha OmahaNE 68182 USAPhysics Department Bryn Mawr College Bryn MawrPA 19010 USADepartment of Electrical and Computer Engineering Institute for Quantum Computing University of Waterloo Ontario N2L3G1 CanadaKey Laboratory of Artificial Structures and Quantum Control Shanghai Center for Complex Physics School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaMork Family Department of Chemical Engineering and Materials Science University of Southern California Los AngelesCA 90089 USANational High Magnetic Field Laboratory Los Alamos National Lab Los AlamosNM 87545 USAInstitute of Applied Physics Technical University of Dresden 01187 Dresden GermanySchool of Materials Science and Engineering Peking University Beijing 100871 ChinaDepartment of Electrical Engineering University at Buffalo The State University of New York BuffaloNY 14226 USADepartment of Physics University at Buffalo The State University of New York BuffaloNY 14226 USAAbstract Covalent 2D magnets such as Cr2Te3, which feature self‐intercalated magnetic cations located between monolayers of transition‐metal dichalcogenide material, offer a unique platform for controlling magnetic order and spin texture, enabling new potential applications for spintronic devices. Here, it is demonstrated that the unconventional anomalous Hall effect (AHE) in Cr2Te3, characterized by additional humps and dips near the coercive field in AHE hysteresis, originates from an intrinsic mechanism dictated by the self‐intercalation. This mechanism is distinctly different from previously proposed mechanisms such as topological Hall effect, or two‐channel AHE arising from spatial inhomogeneities. Crucially, multiple Weyl‐like nodes emerge in the electronic band structure due to strong spin‐orbit coupling, whose positions relative to the Fermi level is sensitively modulated by the canting angles of the self‐intercalated Cr cations. These nodes contribute strongly to the Berry curvature and AHE conductivity. This component competes with the contribution from bands that are less affected by the self‐intercalation, resulting in a sign change in AHE with temperature and the emergence of additional humps and dips. The findings provide compelling evidence for the intrinsic origin of the unconventional AHE in Cr2Te3 and further establish self‐intercalation as a control knob for engineering AHE in complex magnets.https://doi.org/10.1002/advs.2024076252D magnetsanomalous Hall effectBerry curvatureCr2Te3intercalation |
| spellingShingle | Keke He Mengying Bian Samuel D. Seddon Koushik Jagadish Andrea Mucchietto He Ren Erik Kirstein Reza Asadi Jaeil Bai Chao Yao Sheng Pan Jie‐Xiang Yu Peter Milde Chang Huai Haolei Hui Jiadong Zang Renat Sabirianov Xuemei M. Cheng Guoxing Miao Hui Xing Yu‐Tsun Shao Scott A. Crooker Lukas Eng Yanglong Hou Jonathan P. Bird Hao Zeng Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 Advanced Science 2D magnets anomalous Hall effect Berry curvature Cr2Te3 intercalation |
| title | Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 |
| title_full | Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 |
| title_fullStr | Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 |
| title_full_unstemmed | Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 |
| title_short | Unconventional Anomalous Hall Effect Driven by Self‐Intercalation in Covalent 2D Magnet Cr2Te3 |
| title_sort | unconventional anomalous hall effect driven by self intercalation in covalent 2d magnet cr2te3 |
| topic | 2D magnets anomalous Hall effect Berry curvature Cr2Te3 intercalation |
| url | https://doi.org/10.1002/advs.202407625 |
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