Anisotropic magnetoelastic coupling in the honeycomb magnet Na$_3$Co$_2$SbO$_6$
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866914604163006464 |
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| author | Mukharjee, Prashanta K. Erdmann, Sebastian Wang, Lichen Kaiser, Julian Jesche, Anton Puphal, Pascal Isobe, Masahiko Hepting, Matthias Keimer, Bernhard Gegenwart, Philipp Tsirlin, Alexander A. |
| author_facet | Mukharjee, Prashanta K. Erdmann, Sebastian Wang, Lichen Kaiser, Julian Jesche, Anton Puphal, Pascal Isobe, Masahiko Hepting, Matthias Keimer, Bernhard Gegenwart, Philipp Tsirlin, Alexander A. |
| contents | We present magnetization and dilatometry measurements on the honeycomb cobaltate Na$_3$Co$_2$SbO$_6$ and map out its detailed field-temperature phase diagram down to sub-Kelvin temperatures. Our data for in-plane magnetic fields show a strongly anisotropic $c^{*}$-axis lattice response, which is dominated by the variation of Co--O--Co bond angles according to \textit{ab initio} calculations. At $T = 0.4$~K, the magnetization $M(B)$ exhibits step-like features that are also highly anisotropic. In the case of $B \parallel b$, a small hysteresis observed around the second field-induced magnetic transition ($B_{c2}$) indicates its first-order character, whereas divergence of the magnetic Grüneisen parameter at $B_{c2}$ is suppressed upon cooling and signals the absence of quantum critical behavior upon entering the field-polarized state. None of our thermodynamic measurements provide evidence for a field-induced quantum spin liquid state near or above $B_{c2}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03214 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropic magnetoelastic coupling in the honeycomb magnet Na$_3$Co$_2$SbO$_6$ Mukharjee, Prashanta K. Erdmann, Sebastian Wang, Lichen Kaiser, Julian Jesche, Anton Puphal, Pascal Isobe, Masahiko Hepting, Matthias Keimer, Bernhard Gegenwart, Philipp Tsirlin, Alexander A. Strongly Correlated Electrons Materials Science We present magnetization and dilatometry measurements on the honeycomb cobaltate Na$_3$Co$_2$SbO$_6$ and map out its detailed field-temperature phase diagram down to sub-Kelvin temperatures. Our data for in-plane magnetic fields show a strongly anisotropic $c^{*}$-axis lattice response, which is dominated by the variation of Co--O--Co bond angles according to \textit{ab initio} calculations. At $T = 0.4$~K, the magnetization $M(B)$ exhibits step-like features that are also highly anisotropic. In the case of $B \parallel b$, a small hysteresis observed around the second field-induced magnetic transition ($B_{c2}$) indicates its first-order character, whereas divergence of the magnetic Grüneisen parameter at $B_{c2}$ is suppressed upon cooling and signals the absence of quantum critical behavior upon entering the field-polarized state. None of our thermodynamic measurements provide evidence for a field-induced quantum spin liquid state near or above $B_{c2}$. |
| title | Anisotropic magnetoelastic coupling in the honeycomb magnet Na$_3$Co$_2$SbO$_6$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2603.03214 |