Possible Bose-Einstein condensation of magnons in a S = 5/2 honeycomb lattice
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917013317746688 |
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| author | Khatua, J. Kumawat, S. M. Murugan, G. Senthil Huang, C. -L. Kim, Heung-Sik Sritharan, K. Sankar, R. Choi, Kwang-Yong |
| author_facet | Khatua, J. Kumawat, S. M. Murugan, G. Senthil Huang, C. -L. Kim, Heung-Sik Sritharan, K. Sankar, R. Choi, Kwang-Yong |
| contents | Quantum magnets offer a unique platform for exploring exotic quantum phases and quantum phase transitions through external magnetic fields. A prominent example is the field-induced Bose--Einstein condensation (BEC) of magnons near the saturation field. While this behavior has been observed in low-spin systems, its realization in high-spin, quasi-two-dimensional magnets -- where multiple on-site excitations are possible -- remains exceptionally rare. Here, we report thermodynamic and density functional theory results on single crystals of the honeycomb-lattice antiferromagnet K$_{4}$MnMo$_{4}$O$_{15}$ with $S = 5/2$. The system undergoes a field-induced transition to a fully polarized state at the critical field $μ_{0}H_{\rm s} = 6.4$~T. Our results reveal possible thermodynamic signatures of magnon BEC, $T_{\mathrm{N}} \sim (H_{\rm s} - H)^{2/d}$ ($d = 3$), expanding the purview of BEC-driven quantum criticality to a high-spin, quasi-two-dimensional antiferromagnets with negligibly small anisotropy. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_12682 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Possible Bose-Einstein condensation of magnons in a S = 5/2 honeycomb lattice Khatua, J. Kumawat, S. M. Murugan, G. Senthil Huang, C. -L. Kim, Heung-Sik Sritharan, K. Sankar, R. Choi, Kwang-Yong Strongly Correlated Electrons Quantum magnets offer a unique platform for exploring exotic quantum phases and quantum phase transitions through external magnetic fields. A prominent example is the field-induced Bose--Einstein condensation (BEC) of magnons near the saturation field. While this behavior has been observed in low-spin systems, its realization in high-spin, quasi-two-dimensional magnets -- where multiple on-site excitations are possible -- remains exceptionally rare. Here, we report thermodynamic and density functional theory results on single crystals of the honeycomb-lattice antiferromagnet K$_{4}$MnMo$_{4}$O$_{15}$ with $S = 5/2$. The system undergoes a field-induced transition to a fully polarized state at the critical field $μ_{0}H_{\rm s} = 6.4$~T. Our results reveal possible thermodynamic signatures of magnon BEC, $T_{\mathrm{N}} \sim (H_{\rm s} - H)^{2/d}$ ($d = 3$), expanding the purview of BEC-driven quantum criticality to a high-spin, quasi-two-dimensional antiferromagnets with negligibly small anisotropy. |
| title | Possible Bose-Einstein condensation of magnons in a S = 5/2 honeycomb lattice |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.12682 |