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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2502.19259 |
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| _version_ | 1866912299886837760 |
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| author | Cao, Yantao Koda, Akihiro Le, M. D. Pomjakushin, V. Liu, Benqiong Fu, Zhendong Li, Zhiwei Zhao, Jinkui Tian, Zhaoming Guo, Hanjie |
| author_facet | Cao, Yantao Koda, Akihiro Le, M. D. Pomjakushin, V. Liu, Benqiong Fu, Zhendong Li, Zhiwei Zhao, Jinkui Tian, Zhaoming Guo, Hanjie |
| contents | Quantum spin liquid represents an intriguing state where electron spins are highly entangled yet spin fluctuation persists even at 0 K. Recently, the hexaaluminates \textit{R}MgAl$_{11}$O$_{19}$ (\textit{R} = rare earth) have been proposed to be a platform for realizing the quantum spin liquid state with dominant Ising anisotropic correlations. Here, we report detailed low-temperature magnetic susceptibility, muon spin relaxation, and thermodynamic studies on the CeMgAl$_{11}$O$_{19}$ single crystal. Ising anisotropy is revealed by magnetic susceptibility measurements. Muon spin relaxation and ac susceptibility measurements rule out any long-range magnetic ordering or spin freezing down to 50 mK despite the onset of spin correlations below $\sim$0.8 K. Instead, the spins keep fluctuating at a rate of 1.0(2) MHz at 50 mK. Specific heat results indicate a gapless excitation with a power-law dependence on temperature, $C_m(T) \propto T^α$. The quasi-quadratic temperature dependence with $α$ = 2.28(4) in zero field and linear temperature dependence in 0.25 T support the possible realization of the U(1) Dirac quantum spin liquid state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_19259 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl$_{11}$O$_{19}$ Cao, Yantao Koda, Akihiro Le, M. D. Pomjakushin, V. Liu, Benqiong Fu, Zhendong Li, Zhiwei Zhao, Jinkui Tian, Zhaoming Guo, Hanjie Strongly Correlated Electrons Quantum spin liquid represents an intriguing state where electron spins are highly entangled yet spin fluctuation persists even at 0 K. Recently, the hexaaluminates \textit{R}MgAl$_{11}$O$_{19}$ (\textit{R} = rare earth) have been proposed to be a platform for realizing the quantum spin liquid state with dominant Ising anisotropic correlations. Here, we report detailed low-temperature magnetic susceptibility, muon spin relaxation, and thermodynamic studies on the CeMgAl$_{11}$O$_{19}$ single crystal. Ising anisotropy is revealed by magnetic susceptibility measurements. Muon spin relaxation and ac susceptibility measurements rule out any long-range magnetic ordering or spin freezing down to 50 mK despite the onset of spin correlations below $\sim$0.8 K. Instead, the spins keep fluctuating at a rate of 1.0(2) MHz at 50 mK. Specific heat results indicate a gapless excitation with a power-law dependence on temperature, $C_m(T) \propto T^α$. The quasi-quadratic temperature dependence with $α$ = 2.28(4) in zero field and linear temperature dependence in 0.25 T support the possible realization of the U(1) Dirac quantum spin liquid state. |
| title | U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl$_{11}$O$_{19}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2502.19259 |