Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6
Abstract Two-dimensional honeycomb antiferromagnets are promising materials class for realizing Kitaev quantum spin liquids. The signature of these materials includes anisotropic bond-dependent magnetic responses and persistent fluctuations in paramagnetic regime. Here, we propose Cu3Co2SbO6 heteros...
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Nature Portfolio
2025-02-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56652-w |
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| author | Baekjune Kang Uksam Choi Taek Sun Jung Seunghyeon Noh Gye-Hyeon Kim Uihyeon Seo Miju Park Jin-Hyun Choi Min Jae Kim GwangCheol Ji Sehwan Song Hyesung Jo Seokjo Hong Nguyen Xuan Duong Subhasis Samanta Heung-Sik Kim Tae Heon Kim Yongsoo Yang Sungkyun Park Jong Mok Ok Jung-Woo Yoo Jae Hoon Kim Changhee Sohn |
| author_facet | Baekjune Kang Uksam Choi Taek Sun Jung Seunghyeon Noh Gye-Hyeon Kim Uihyeon Seo Miju Park Jin-Hyun Choi Min Jae Kim GwangCheol Ji Sehwan Song Hyesung Jo Seokjo Hong Nguyen Xuan Duong Subhasis Samanta Heung-Sik Kim Tae Heon Kim Yongsoo Yang Sungkyun Park Jong Mok Ok Jung-Woo Yoo Jae Hoon Kim Changhee Sohn |
| author_sort | Baekjune Kang |
| collection | DOAJ |
| description | Abstract Two-dimensional honeycomb antiferromagnets are promising materials class for realizing Kitaev quantum spin liquids. The signature of these materials includes anisotropic bond-dependent magnetic responses and persistent fluctuations in paramagnetic regime. Here, we propose Cu3Co2SbO6 heterostructures as an intriguing candidate, wherein bond-dependent and frustrated spins interact with optical excitons. First-principles spin Hamiltonian calculations and in-plane anisotropic critical fields suggest strong frustration and dominant Kitaev exchange interactions. Optical spectroscopy reveals exciton coupled to frustrated magnetism, enabling optical detection of spin states. Spin-exciton coupling displays anisotropic responses to light polarization along the bond-parallel and the bond-perpendicular directions, highlighting Kitaev interactions and persistent short-range spin correlations above twice the Néel temperatures. The robustness of short-range spin fluctuations under magnetic fields underscores the stability of the spin-fluctuation region. Our results establish Cu3Co2SbO6 as an attractive candidate for exploring quantum spin liquid, where the spin Hamiltonian and quasiparticle excitations can be probed and potentially controlled by light. |
| format | Article |
| id | doaj-art-402421f88d904daab810c295dc3cb8e3 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-402421f88d904daab810c295dc3cb8e32025-02-09T12:45:33ZengNature PortfolioNature Communications2041-17232025-02-0116111010.1038/s41467-025-56652-wOptical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6Baekjune Kang0Uksam Choi1Taek Sun Jung2Seunghyeon Noh3Gye-Hyeon Kim4Uihyeon Seo5Miju Park6Jin-Hyun Choi7Min Jae Kim8GwangCheol Ji9Sehwan Song10Hyesung Jo11Seokjo Hong12Nguyen Xuan Duong13Subhasis Samanta14Heung-Sik Kim15Tae Heon Kim16Yongsoo Yang17Sungkyun Park18Jong Mok Ok19Jung-Woo Yoo20Jae Hoon Kim21Changhee Sohn22Department of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Yonsei UniversityDepartment of Materials Science and Engineering, Ulsan National Institute of Science and TechnologyDepartment of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Ulsan National Institute of Science and TechnologyDepartment of Physics, Pusan National UniversityDepartment of Physics, Pusan National UniversityDepartment of Physics, Pusan National UniversityDepartment of Physics, Korea Advanced Institute of Science and TechnologyDepartment of Physics, Korea Advanced Institute of Science and TechnologyDepartment of Physics and Energy Harvest-Storage Research Center, University of UlsanDepartment of Semiconductor Physics and Institute of Quantum Convergence Technology, Kangwon National UniversityDepartment of Semiconductor Physics and Institute of Quantum Convergence Technology, Kangwon National UniversityDepartment of Physics and Energy Harvest-Storage Research Center, University of UlsanDepartment of Physics, Korea Advanced Institute of Science and TechnologyDepartment of Physics, Pusan National UniversityDepartment of Physics, Pusan National UniversityDepartment of Materials Science and Engineering, Ulsan National Institute of Science and TechnologyDepartment of Physics, Yonsei UniversityDepartment of Physics, Ulsan National Institute of Science and TechnologyAbstract Two-dimensional honeycomb antiferromagnets are promising materials class for realizing Kitaev quantum spin liquids. The signature of these materials includes anisotropic bond-dependent magnetic responses and persistent fluctuations in paramagnetic regime. Here, we propose Cu3Co2SbO6 heterostructures as an intriguing candidate, wherein bond-dependent and frustrated spins interact with optical excitons. First-principles spin Hamiltonian calculations and in-plane anisotropic critical fields suggest strong frustration and dominant Kitaev exchange interactions. Optical spectroscopy reveals exciton coupled to frustrated magnetism, enabling optical detection of spin states. Spin-exciton coupling displays anisotropic responses to light polarization along the bond-parallel and the bond-perpendicular directions, highlighting Kitaev interactions and persistent short-range spin correlations above twice the Néel temperatures. The robustness of short-range spin fluctuations under magnetic fields underscores the stability of the spin-fluctuation region. Our results establish Cu3Co2SbO6 as an attractive candidate for exploring quantum spin liquid, where the spin Hamiltonian and quasiparticle excitations can be probed and potentially controlled by light.https://doi.org/10.1038/s41467-025-56652-w |
| spellingShingle | Baekjune Kang Uksam Choi Taek Sun Jung Seunghyeon Noh Gye-Hyeon Kim Uihyeon Seo Miju Park Jin-Hyun Choi Min Jae Kim GwangCheol Ji Sehwan Song Hyesung Jo Seokjo Hong Nguyen Xuan Duong Subhasis Samanta Heung-Sik Kim Tae Heon Kim Yongsoo Yang Sungkyun Park Jong Mok Ok Jung-Woo Yoo Jae Hoon Kim Changhee Sohn Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 Nature Communications |
| title | Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 |
| title_full | Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 |
| title_fullStr | Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 |
| title_full_unstemmed | Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 |
| title_short | Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 |
| title_sort | optical detection of bond dependent and frustrated spin in the two dimensional cobalt based honeycomb antiferromagnet cu3co2sbo6 |
| url | https://doi.org/10.1038/s41467-025-56652-w |
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