Cascade of magnetic-field-induced quantum spin states in a spin-1 honeycomb magnet
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866913166914486272 |
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| author | Tang, Kaixin Dong, Zhao-Yang Shangguan, Yanyan Gong, Zhao Yang, Ye Bao, Song Li, Houpu Zhang, Nan Li, Hongyu Li, Jian-Xin Wen, Jinsheng Xiang, Ziji Chen, Xianhui |
| author_facet | Tang, Kaixin Dong, Zhao-Yang Shangguan, Yanyan Gong, Zhao Yang, Ye Bao, Song Li, Houpu Zhang, Nan Li, Hongyu Li, Jian-Xin Wen, Jinsheng Xiang, Ziji Chen, Xianhui |
| contents | Quantum fluctuations endow spin systems with surprisingly enriched magnetic phase diagrams. In frustrated magnets, strong quantum fluctuations boosted by either geometrical incompatibility or competitive exchange interactions stabilize cascades of unusual phases of matter. Here we reveal the presence of multiple quantum phases in the honeycomb antiferromagnet Na$_{3}$Ni$_{2}$BiO$_{6}$, both inside and beyond its field-induced one-third magnetization plateau. Comprehensive measurements of thermodynamic quantities demonstrate that the one-third plateau comprises at least three distinct spin states with nearly-degenerate net magnetization, separated by first-order transitions that likely involve sequential spin reconfiguration. Upon further increasing the magnetic field, the system evolves across a myriad of peculiar phases before reaching full polarization; these intermediate phases possess copious low-energy excitations, manifested by anomalous upturns of specific heat at ultralow temperatures -- probably hinting at the development of "hidden" ordered ground states. The complex magnetic phase diagram of Na$_{3}$Ni$_{2}$BiO$_{6}$ underlines the preponderant impact of quantum fluctuations on a honeycomb spin lattice with strong exchange frustration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_28118 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cascade of magnetic-field-induced quantum spin states in a spin-1 honeycomb magnet Tang, Kaixin Dong, Zhao-Yang Shangguan, Yanyan Gong, Zhao Yang, Ye Bao, Song Li, Houpu Zhang, Nan Li, Hongyu Li, Jian-Xin Wen, Jinsheng Xiang, Ziji Chen, Xianhui Strongly Correlated Electrons Quantum fluctuations endow spin systems with surprisingly enriched magnetic phase diagrams. In frustrated magnets, strong quantum fluctuations boosted by either geometrical incompatibility or competitive exchange interactions stabilize cascades of unusual phases of matter. Here we reveal the presence of multiple quantum phases in the honeycomb antiferromagnet Na$_{3}$Ni$_{2}$BiO$_{6}$, both inside and beyond its field-induced one-third magnetization plateau. Comprehensive measurements of thermodynamic quantities demonstrate that the one-third plateau comprises at least three distinct spin states with nearly-degenerate net magnetization, separated by first-order transitions that likely involve sequential spin reconfiguration. Upon further increasing the magnetic field, the system evolves across a myriad of peculiar phases before reaching full polarization; these intermediate phases possess copious low-energy excitations, manifested by anomalous upturns of specific heat at ultralow temperatures -- probably hinting at the development of "hidden" ordered ground states. The complex magnetic phase diagram of Na$_{3}$Ni$_{2}$BiO$_{6}$ underlines the preponderant impact of quantum fluctuations on a honeycomb spin lattice with strong exchange frustration. |
| title | Cascade of magnetic-field-induced quantum spin states in a spin-1 honeycomb magnet |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.28118 |