Finite-temperature properties of the easy-axis Heisenberg model on frustrated lattices
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866910333226975232 |
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| author | Ulaga, Martin Kokalj, Jure Wietek, Alexander Zorko, Andrej Prelovšek, Peter |
| author_facet | Ulaga, Martin Kokalj, Jure Wietek, Alexander Zorko, Andrej Prelovšek, Peter |
| contents | Motivated by recent experiments on a compound {displaying Ising-like short-range correlations on the triangular lattice, we study the anisotropic easy-axis spin-$1/2$ Heisenberg model on the triangular and kagome lattice} by performing numerical calculations of finite-temperature properties, in particular of static spin structure factor and of thermodynamic quantities, on systems with up to 36 sites. On the triangular lattice, the low-temperature spin structure factor {exhibits long-range} spin correlations in the whole range of anisotropies, whereas thermodynamic quantities reveal a crossover upon increasing the anisotropy, most pronounced in the vanishing generalized Wilson ratio in the easy-axis regime. In contrast, on the kagome lattice, the spin structure factor is short-range, and thermodynamic quantities evolve steadily between the easy-axis and the isotropic case, consistent with the interpretation in terms of {a} spin liquid. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_03545 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Finite-temperature properties of the easy-axis Heisenberg model on frustrated lattices Ulaga, Martin Kokalj, Jure Wietek, Alexander Zorko, Andrej Prelovšek, Peter Strongly Correlated Electrons Motivated by recent experiments on a compound {displaying Ising-like short-range correlations on the triangular lattice, we study the anisotropic easy-axis spin-$1/2$ Heisenberg model on the triangular and kagome lattice} by performing numerical calculations of finite-temperature properties, in particular of static spin structure factor and of thermodynamic quantities, on systems with up to 36 sites. On the triangular lattice, the low-temperature spin structure factor {exhibits long-range} spin correlations in the whole range of anisotropies, whereas thermodynamic quantities reveal a crossover upon increasing the anisotropy, most pronounced in the vanishing generalized Wilson ratio in the easy-axis regime. In contrast, on the kagome lattice, the spin structure factor is short-range, and thermodynamic quantities evolve steadily between the easy-axis and the isotropic case, consistent with the interpretation in terms of {a} spin liquid. |
| title | Finite-temperature properties of the easy-axis Heisenberg model on frustrated lattices |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.03545 |