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| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.01957 |
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| _version_ | 1866914236908699648 |
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| author | Zhou, Xu-Guang Li, Han Kim, Chaebin Matsuo, Akira Mehlawat, Kavita Matsui, Kazuki Yang, Zhuo Miyata, Atsuhiko Su, Gang Kindo, Koichi Park, Je-Geun Kohama, Yoshimitsu Li, Wei Matsuda, Yasuhiro H. |
| author_facet | Zhou, Xu-Guang Li, Han Kim, Chaebin Matsuo, Akira Mehlawat, Kavita Matsui, Kazuki Yang, Zhuo Miyata, Atsuhiko Su, Gang Kindo, Koichi Park, Je-Geun Kohama, Yoshimitsu Li, Wei Matsuda, Yasuhiro H. |
| contents | The identification of quantum spin liquid phases in Kitaev candidate materials remains a major experimental challenge. Since most Kitaev candidates develop antiferromagnetic (AFM) order at low temperatures, currently there are great interest on the field-induced magnetic disordered phase in these compounds, that are distinct from (partially) polarized states. Recently, a cobaltate Na$_2$Co$_2$TeO$_6$ has emerged as a promising Kitaev candidate with high-spin $t^{5}_{2g}e^2_g$ configuration and spin-orbit entangled $J_{\rm eff} = 1/2$ honeycomb lattice system. There are intensive studies on field-induced magnetic states and phase transitions under in-plane magnetic fields. In this study, we propose an intermediate disordered phase induced by an out-of-plane field along the $c$-axis, through high-field magnetization and magnetocaloric effect measurements. To explain the high-field behavior of Na$_2$Co$_2$TeO$_6$, we develop an effective $K$-$J$-$Γ$-$Γ^{\prime}$ spin model featuring a dominant AFM Kitaev interaction. This framework uncovers an intermediate quantum spin liquid phase, establishing the material as a unique platform for exploring Kitaev physics and field-induced quantum-disordered states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_01957 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dominant Kitaev Interaction and Field-induced Quantum Disordered Phase in the Cobaltate Na$_2$Co$_2$TeO$_6$ Zhou, Xu-Guang Li, Han Kim, Chaebin Matsuo, Akira Mehlawat, Kavita Matsui, Kazuki Yang, Zhuo Miyata, Atsuhiko Su, Gang Kindo, Koichi Park, Je-Geun Kohama, Yoshimitsu Li, Wei Matsuda, Yasuhiro H. Strongly Correlated Electrons The identification of quantum spin liquid phases in Kitaev candidate materials remains a major experimental challenge. Since most Kitaev candidates develop antiferromagnetic (AFM) order at low temperatures, currently there are great interest on the field-induced magnetic disordered phase in these compounds, that are distinct from (partially) polarized states. Recently, a cobaltate Na$_2$Co$_2$TeO$_6$ has emerged as a promising Kitaev candidate with high-spin $t^{5}_{2g}e^2_g$ configuration and spin-orbit entangled $J_{\rm eff} = 1/2$ honeycomb lattice system. There are intensive studies on field-induced magnetic states and phase transitions under in-plane magnetic fields. In this study, we propose an intermediate disordered phase induced by an out-of-plane field along the $c$-axis, through high-field magnetization and magnetocaloric effect measurements. To explain the high-field behavior of Na$_2$Co$_2$TeO$_6$, we develop an effective $K$-$J$-$Γ$-$Γ^{\prime}$ spin model featuring a dominant AFM Kitaev interaction. This framework uncovers an intermediate quantum spin liquid phase, establishing the material as a unique platform for exploring Kitaev physics and field-induced quantum-disordered states. |
| title | Dominant Kitaev Interaction and Field-induced Quantum Disordered Phase in the Cobaltate Na$_2$Co$_2$TeO$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.01957 |