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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.16944 |
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| _version_ | 1866912081805049856 |
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| author | Zhang, Xiangyu Wang, Da Wu, Congjun |
| author_facet | Zhang, Xiangyu Wang, Da Wu, Congjun |
| contents | Spin-orbit coupling in solids is typically a single-body effect arising from relativity. In this work, we propose a spontaneous generation of spin-orbit coupling from symmetry breaking. A spin-dependent electron-phonon coupling model is investigated on a half-filled square lattice, which is solved by sign-problem-free quantum Monte Carlo simulations. The phase diagram as function of phonon frequency $ω$ and coupling constant $λ$ is fully investigated. The spin-orbit coupling emerges as an order in the ground state for any $λ$ in the adiabatic limit, accompanied by a breathing mode of lattice distortion and a staggered loop spin-current. This phase dominates in the entire range of $ω$ with $λ< λ_{\infty}$, a critical value in the $ω\to \infty$ limit. With increasing $ω$ and $λ> λ_{\infty}$, the emergent spin-orbit coupling is suppressed and a phase transition occurs leading to charge-density-wave degenerate with superconductivity order. Our work opens up the possibility of hidden spin-orbit coupling in materials where it is otherwise forbidden by lattice symmetry and paves the way to explore new usable materials or devices in spintronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16944 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum Phonon Dynamics Induced Spontaneous Spin-Orbit Coupling Zhang, Xiangyu Wang, Da Wu, Congjun Strongly Correlated Electrons Quantum Physics Spin-orbit coupling in solids is typically a single-body effect arising from relativity. In this work, we propose a spontaneous generation of spin-orbit coupling from symmetry breaking. A spin-dependent electron-phonon coupling model is investigated on a half-filled square lattice, which is solved by sign-problem-free quantum Monte Carlo simulations. The phase diagram as function of phonon frequency $ω$ and coupling constant $λ$ is fully investigated. The spin-orbit coupling emerges as an order in the ground state for any $λ$ in the adiabatic limit, accompanied by a breathing mode of lattice distortion and a staggered loop spin-current. This phase dominates in the entire range of $ω$ with $λ< λ_{\infty}$, a critical value in the $ω\to \infty$ limit. With increasing $ω$ and $λ> λ_{\infty}$, the emergent spin-orbit coupling is suppressed and a phase transition occurs leading to charge-density-wave degenerate with superconductivity order. Our work opens up the possibility of hidden spin-orbit coupling in materials where it is otherwise forbidden by lattice symmetry and paves the way to explore new usable materials or devices in spintronics. |
| title | Quantum Phonon Dynamics Induced Spontaneous Spin-Orbit Coupling |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2410.16944 |