UOTe: Kondo-interacting topological antiferromagnet in a van der Waals lattice
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866915041742159872 |
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| author | Broyles, Christopher Mardanya, Sougata Liu, Mengke Ahn, Junyeong Dinh, Thao Alqasseri, Gadeer Garner, Jalen Rehfuss, Zackary Guo, Ken Zhu, Jiahui Martinez, David Li, Du Hao, Yiqing Cao, Huibo Boswell, Matt Xie, Weiwei Philbrick, Jeremy G. Kong, Tai Yang, Li Vishwanath, Ashvin Kim, Philip Xu, Su-Yang Hoffman, Jennifer E. Denlinger, Jonathan D. Chowdhury, Sugata Ran, Sheng |
| author_facet | Broyles, Christopher Mardanya, Sougata Liu, Mengke Ahn, Junyeong Dinh, Thao Alqasseri, Gadeer Garner, Jalen Rehfuss, Zackary Guo, Ken Zhu, Jiahui Martinez, David Li, Du Hao, Yiqing Cao, Huibo Boswell, Matt Xie, Weiwei Philbrick, Jeremy G. Kong, Tai Yang, Li Vishwanath, Ashvin Kim, Philip Xu, Su-Yang Hoffman, Jennifer E. Denlinger, Jonathan D. Chowdhury, Sugata Ran, Sheng |
| contents | Since the initial discovery of two-dimensional van der Waals (vdW) materials, significant effort has been made to incorporate the three properties of magnetism, band structure topology, and strong electron correlations $-$ to leverage emergent quantum phenomena and expand their potential applications. However, the discovery of a single vdW material that intrinsically hosts all three ingredients has remained an outstanding challenge. Here we report the discovery of a Kondo-interacting topological antiferromagnet in the vdW 5$f$ electron system UOTe. It has a high antiferromagnetic (AFM) transition temperature of 150 K, with a unique AFM configuration that breaks the combined parity and time reversal ($PT$) symmetry in an even number of layers while maintaining zero net magnetic moment. Our angle-resolved photoemission spectroscopy (ARPES) measurements reveal Dirac bands near the Fermi level, which combined with our theoretical calculations demonstrate UOTe as an AFM Dirac semimetal. Within the AFM order, we observed the presence of the Kondo interaction, as evidenced by the emergence of a 5$f$ flat band near the Fermi level below 100 K and hybridization between the Kondo band and the Dirac band. Our density functional theory calculations in its bilayer form predict UOTe as a rare example of a fully-compensated AFM Chern insulator. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_08816 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | UOTe: Kondo-interacting topological antiferromagnet in a van der Waals lattice Broyles, Christopher Mardanya, Sougata Liu, Mengke Ahn, Junyeong Dinh, Thao Alqasseri, Gadeer Garner, Jalen Rehfuss, Zackary Guo, Ken Zhu, Jiahui Martinez, David Li, Du Hao, Yiqing Cao, Huibo Boswell, Matt Xie, Weiwei Philbrick, Jeremy G. Kong, Tai Yang, Li Vishwanath, Ashvin Kim, Philip Xu, Su-Yang Hoffman, Jennifer E. Denlinger, Jonathan D. Chowdhury, Sugata Ran, Sheng Strongly Correlated Electrons Since the initial discovery of two-dimensional van der Waals (vdW) materials, significant effort has been made to incorporate the three properties of magnetism, band structure topology, and strong electron correlations $-$ to leverage emergent quantum phenomena and expand their potential applications. However, the discovery of a single vdW material that intrinsically hosts all three ingredients has remained an outstanding challenge. Here we report the discovery of a Kondo-interacting topological antiferromagnet in the vdW 5$f$ electron system UOTe. It has a high antiferromagnetic (AFM) transition temperature of 150 K, with a unique AFM configuration that breaks the combined parity and time reversal ($PT$) symmetry in an even number of layers while maintaining zero net magnetic moment. Our angle-resolved photoemission spectroscopy (ARPES) measurements reveal Dirac bands near the Fermi level, which combined with our theoretical calculations demonstrate UOTe as an AFM Dirac semimetal. Within the AFM order, we observed the presence of the Kondo interaction, as evidenced by the emergence of a 5$f$ flat band near the Fermi level below 100 K and hybridization between the Kondo band and the Dirac band. Our density functional theory calculations in its bilayer form predict UOTe as a rare example of a fully-compensated AFM Chern insulator. |
| title | UOTe: Kondo-interacting topological antiferromagnet in a van der Waals lattice |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.08816 |