Atomically Thin Kagome-Structured Co9Te16 Achieved through Self-Intercalation and Its Flat Band Visualization
Kagome materials have recently garnered substantial attention due to the intrinsic flat band feature and the stimulated magnetic and spin-related many-body physics. In contrast to their bulk counterparts, two-dimensional (2D) kagome materials feature more distinct kagome bands, beneficial for explor...
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Published in | Nano letters Vol. 24; no. 25; pp. 7672 - 7680 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
American Chemical Society
26.06.2024
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Subjects | |
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Abstract | Kagome materials have recently garnered substantial attention due to the intrinsic flat band feature and the stimulated magnetic and spin-related many-body physics. In contrast to their bulk counterparts, two-dimensional (2D) kagome materials feature more distinct kagome bands, beneficial for exploring novel quantum phenomena. Herein, we report the direct synthesis of an ultrathin kagome-structured Co-telluride (Co9Te16) via a molecular beam epitaxy (MBE) route and clarify its formation mechanism from the Co-intercalation in the 1T-CoTe2 layers. More significantly, we unveil the flat band states in the ultrathin Co9Te16 and identify the real-space localization of the flat band states by in situ scanning tunneling microscopy/spectroscopy (STM/STS) combined with first-principles calculations. A ferrimagnetic order is also predicted in kagome-Co9Te16. This work should provide a novel route for the direct synthesis of ultrathin kagome materials via a metal self-intercalation route, which should shed light on the exploration of the intriguing flat band physics in the related systems. |
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AbstractList | Kagome materials have recently garnered substantial attention due to the intrinsic flat band feature and the stimulated magnetic and spin-related many-body physics. In contrast to their bulk counterparts, two-dimensional (2D) kagome materials feature more distinct kagome bands, beneficial for exploring novel quantum phenomena. Herein, we report the direct synthesis of an ultrathin kagome-structured Co-telluride (Co9Te16) via a molecular beam epitaxy (MBE) route and clarify its formation mechanism from the Co-intercalation in the 1T-CoTe2 layers. More significantly, we unveil the flat band states in the ultrathin Co9Te16 and identify the real-space localization of the flat band states by in situ scanning tunneling microscopy/spectroscopy (STM/STS) combined with first-principles calculations. A ferrimagnetic order is also predicted in kagome-Co9Te16. This work should provide a novel route for the direct synthesis of ultrathin kagome materials via a metal self-intercalation route, which should shed light on the exploration of the intriguing flat band physics in the related systems.Kagome materials have recently garnered substantial attention due to the intrinsic flat band feature and the stimulated magnetic and spin-related many-body physics. In contrast to their bulk counterparts, two-dimensional (2D) kagome materials feature more distinct kagome bands, beneficial for exploring novel quantum phenomena. Herein, we report the direct synthesis of an ultrathin kagome-structured Co-telluride (Co9Te16) via a molecular beam epitaxy (MBE) route and clarify its formation mechanism from the Co-intercalation in the 1T-CoTe2 layers. More significantly, we unveil the flat band states in the ultrathin Co9Te16 and identify the real-space localization of the flat band states by in situ scanning tunneling microscopy/spectroscopy (STM/STS) combined with first-principles calculations. A ferrimagnetic order is also predicted in kagome-Co9Te16. This work should provide a novel route for the direct synthesis of ultrathin kagome materials via a metal self-intercalation route, which should shed light on the exploration of the intriguing flat band physics in the related systems. Kagome materials have recently garnered substantial attention due to the intrinsic flat band feature and the stimulated magnetic and spin-related many-body physics. In contrast to their bulk counterparts, two-dimensional (2D) kagome materials feature more distinct kagome bands, beneficial for exploring novel quantum phenomena. Herein, we report the direct synthesis of an ultrathin kagome-structured Co-telluride (Co9Te16) via a molecular beam epitaxy (MBE) route and clarify its formation mechanism from the Co-intercalation in the 1T-CoTe2 layers. More significantly, we unveil the flat band states in the ultrathin Co9Te16 and identify the real-space localization of the flat band states by in situ scanning tunneling microscopy/spectroscopy (STM/STS) combined with first-principles calculations. A ferrimagnetic order is also predicted in kagome-Co9Te16. This work should provide a novel route for the direct synthesis of ultrathin kagome materials via a metal self-intercalation route, which should shed light on the exploration of the intriguing flat band physics in the related systems. |
Author | Wang, Jian Hu, Jingyi Zhang, Zehui Zhang, Yanfeng Pan, Shuangyuan Zheng, Feipeng Quan, Wenzhi Wu, Qilong |
AuthorAffiliation | School of Materials Science and Engineering International Center for Quantum Materials, School of Physics Peking University Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics Hefei National Laboratory Academy for Advanced Interdisciplinary Studies Collaborative Innovation Center of Quantum Matter |
AuthorAffiliation_xml | – name: Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics – name: School of Materials Science and Engineering – name: Collaborative Innovation Center of Quantum Matter – name: Peking University – name: Hefei National Laboratory – name: International Center for Quantum Materials, School of Physics – name: Academy for Advanced Interdisciplinary Studies |
Author_xml | – sequence: 1 givenname: Qilong surname: Wu fullname: Wu, Qilong organization: School of Materials Science and Engineering – sequence: 2 givenname: Wenzhi surname: Quan fullname: Quan, Wenzhi organization: Peking University – sequence: 3 givenname: Shuangyuan surname: Pan fullname: Pan, Shuangyuan organization: School of Materials Science and Engineering – sequence: 4 givenname: Jingyi surname: Hu fullname: Hu, Jingyi organization: Peking University – sequence: 5 givenname: Zehui surname: Zhang fullname: Zhang, Zehui organization: School of Materials Science and Engineering – sequence: 6 givenname: Jian orcidid: 0000-0002-7212-0904 surname: Wang fullname: Wang, Jian organization: Hefei National Laboratory – sequence: 7 givenname: Feipeng surname: Zheng fullname: Zheng, Feipeng email: fpzheng_phy@email.jnu.edu.cn organization: Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics – sequence: 8 givenname: Yanfeng orcidid: 0000-0003-1319-3270 surname: Zhang fullname: Zhang, Yanfeng email: yanfengzhang@pku.edu.cn organization: Peking University |
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Title | Atomically Thin Kagome-Structured Co9Te16 Achieved through Self-Intercalation and Its Flat Band Visualization |
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