Entangled orbital, spin, and ferroelectric orders in $p$-electron magnet CsO$_2$
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929586898468864 |
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| author | Ono, Ryota Kaushik, Ravi Artyukhin, Sergey Jansen, Martin Solovyev, Igor Ewings, Russell A. |
| author_facet | Ono, Ryota Kaushik, Ravi Artyukhin, Sergey Jansen, Martin Solovyev, Igor Ewings, Russell A. |
| contents | Alkali superoxides differ from conventional transition metal magnets, exhibit magnetism from partially occupied oxygen molecular $π^*$-orbitals. Among them, CsO$_2$ stands out for its potential to exhibit novel quantum collective phenomena, such as an orbital order induced Tomonaga-Luttinger liquid state. Using ab-initio Hubbard models, superexchange theory, and experimental spin wave measurements, we propose that CsO$_2$ exhibits unconventional magnetoelectric characteristics at low temperature. Our analysis confirms a canted antiferromagnetic ground state and a spin-flop transition, with ferroelectricity is induced by breaking inversion and time-reversal symmetry in the spin-flop phase. Consequently, our analysis reveals a strong interplay not only between exchange interactions but also among magnetically-induced polarization and orbital order. The magnetic structure, stabilized by orbital order, induces magnetically-induced polarization through an antisymmetric mechanism. Overall, our results reveal the coexistence of three highly entangled orders in CsO$_2$, namely, orbital, spin and ferroelectricity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_06671 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Entangled orbital, spin, and ferroelectric orders in $p$-electron magnet CsO$_2$ Ono, Ryota Kaushik, Ravi Artyukhin, Sergey Jansen, Martin Solovyev, Igor Ewings, Russell A. Strongly Correlated Electrons Alkali superoxides differ from conventional transition metal magnets, exhibit magnetism from partially occupied oxygen molecular $π^*$-orbitals. Among them, CsO$_2$ stands out for its potential to exhibit novel quantum collective phenomena, such as an orbital order induced Tomonaga-Luttinger liquid state. Using ab-initio Hubbard models, superexchange theory, and experimental spin wave measurements, we propose that CsO$_2$ exhibits unconventional magnetoelectric characteristics at low temperature. Our analysis confirms a canted antiferromagnetic ground state and a spin-flop transition, with ferroelectricity is induced by breaking inversion and time-reversal symmetry in the spin-flop phase. Consequently, our analysis reveals a strong interplay not only between exchange interactions but also among magnetically-induced polarization and orbital order. The magnetic structure, stabilized by orbital order, induces magnetically-induced polarization through an antisymmetric mechanism. Overall, our results reveal the coexistence of three highly entangled orders in CsO$_2$, namely, orbital, spin and ferroelectricity. |
| title | Entangled orbital, spin, and ferroelectric orders in $p$-electron magnet CsO$_2$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2411.06671 |