Magnetic Frustration in CuYbSe$_2$: an Yb-Based Triangular Lattice Selenide
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arXiv
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| Format: | Preprint |
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2025
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| author | Khattar, Barkha Ali, Anzar Isobe, Masahiko Singh, Yogesh |
| author_facet | Khattar, Barkha Ali, Anzar Isobe, Masahiko Singh, Yogesh |
| contents | The Yb based triangular lattice delafossites $A$Yb$X_2$ ($A$ = alkali metal, $X$ = O, S, Se) have recently been studied as quantum spin liquid candidates. We report the synthesis of powders and single crystals of CuYbSe$_2$ with a perfect triangular lattice of Yb$^{3+}$ moments. Magnetic susceptibility and heat capacity measurements reveal no evidence of long-range magnetic ordering down to $1.8$~K in spite of a significant antiferromagnetic exchange between Yb$^{3+}$ moments, suggesting a frustrated magnetic system. Electrical resistivity measurements indicate insulating behavior, consistent with the localized nature of magnetic moments. Heat capacity reveals that CuYbSe$_2$ can be treated as an effective spin $S = 1/2$ triangular lattice antiferromagnet below $\sim 50$~K. Magnetic susceptibility measurements on single crystals reveals weak magnetic anisotropy. These properties position CuYbSe$_2$ as a promising candidate for a quantum spin liquid state and as a new platform for exploring exotic magnetic ground states in triangular lattice systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_17023 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic Frustration in CuYbSe$_2$: an Yb-Based Triangular Lattice Selenide Khattar, Barkha Ali, Anzar Isobe, Masahiko Singh, Yogesh Strongly Correlated Electrons The Yb based triangular lattice delafossites $A$Yb$X_2$ ($A$ = alkali metal, $X$ = O, S, Se) have recently been studied as quantum spin liquid candidates. We report the synthesis of powders and single crystals of CuYbSe$_2$ with a perfect triangular lattice of Yb$^{3+}$ moments. Magnetic susceptibility and heat capacity measurements reveal no evidence of long-range magnetic ordering down to $1.8$~K in spite of a significant antiferromagnetic exchange between Yb$^{3+}$ moments, suggesting a frustrated magnetic system. Electrical resistivity measurements indicate insulating behavior, consistent with the localized nature of magnetic moments. Heat capacity reveals that CuYbSe$_2$ can be treated as an effective spin $S = 1/2$ triangular lattice antiferromagnet below $\sim 50$~K. Magnetic susceptibility measurements on single crystals reveals weak magnetic anisotropy. These properties position CuYbSe$_2$ as a promising candidate for a quantum spin liquid state and as a new platform for exploring exotic magnetic ground states in triangular lattice systems. |
| title | Magnetic Frustration in CuYbSe$_2$: an Yb-Based Triangular Lattice Selenide |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.17023 |