Altermagnetism and Strain Induced Altermagnetic Transition in Cairo Pentagonal Monolayer
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910759162740736 |
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| author | Li, Shuyi Zhang, Yu Bahri, Adrian Zhang, Xiaoliang Jia, Chunjing |
| author_facet | Li, Shuyi Zhang, Yu Bahri, Adrian Zhang, Xiaoliang Jia, Chunjing |
| contents | Altermagnetism, a recently discovered class of magnetic order characterized by vanishing net magnetization and spin-splitting band structures, has garnered significant research attention. In this work, we introduce a novel two-dimensional system that exhibits $g$-wave altermagnetism and undergoes a strain-induced transition from $g$-wave to $d$-wave altermagnetism. This system can be realized in an unconventional monolayer Cairo pentagonal lattice, for which we present a realistic tight-binding model that incorporates both magnetic and non-magnetic sites. Furthermore, we demonstrate that non-trivial band topology can emerge in this system by breaking the symmetry that protects the spin-polarized nodal points. Finally, \emph{ab initio} calculations on several candidate materials, such as FeS$_2$ and Nb$_2$FeB$_2$, which exhibit symmetry consistent with the proposed tight-binding Hamiltonian, are also presented. These findings open new avenues for exploring spintronic devices based on altermagnetic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_16857 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Altermagnetism and Strain Induced Altermagnetic Transition in Cairo Pentagonal Monolayer Li, Shuyi Zhang, Yu Bahri, Adrian Zhang, Xiaoliang Jia, Chunjing Strongly Correlated Electrons Altermagnetism, a recently discovered class of magnetic order characterized by vanishing net magnetization and spin-splitting band structures, has garnered significant research attention. In this work, we introduce a novel two-dimensional system that exhibits $g$-wave altermagnetism and undergoes a strain-induced transition from $g$-wave to $d$-wave altermagnetism. This system can be realized in an unconventional monolayer Cairo pentagonal lattice, for which we present a realistic tight-binding model that incorporates both magnetic and non-magnetic sites. Furthermore, we demonstrate that non-trivial band topology can emerge in this system by breaking the symmetry that protects the spin-polarized nodal points. Finally, \emph{ab initio} calculations on several candidate materials, such as FeS$_2$ and Nb$_2$FeB$_2$, which exhibit symmetry consistent with the proposed tight-binding Hamiltonian, are also presented. These findings open new avenues for exploring spintronic devices based on altermagnetic systems. |
| title | Altermagnetism and Strain Induced Altermagnetic Transition in Cairo Pentagonal Monolayer |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2412.16857 |