Spin-orbit coupled honeycomb magnets with the Kitaev interaction have received a lot of attention due to their potential of hosting exotic quantum states including quantum spin liquids. Thus far, the most studied Kitaev systems are 4d/5d-based honeycomb magnets. Recent theoretical studies predicted that 3d-based honeycomb magnets, including Na2Co2TeO6 (NCTO), could also be a potential Kitaev system. Here, we have used a combination of heat capacity, magnetization, electron spin resonance measurements alongside inelastic neutron scattering (INS) to study NCTO's quantum magnetism, and we have found a field-induced spin disordered state in an applied magnetic field range of 7.5 T < B (vertical to b-axis) < 10.5 T. The INS spectra were also simulated to tentatively extract the exchange interactions. As a 3d-magnet with a field-induced disordered state on an effective spin-1/2 honeycomb lattice, NCTO expands the Kitaev model to 3d compounds, promoting further interests on the spin-orbital effect in quantum magnets.
@article{arxiv.2012.00940,
title = {Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6},
author = {Gaoting Lin and Jaehong Jeong and Chaebin Kim and Yao Wang and Qing Huang and Takatsugu Masuda and Shinichiro Asai and Shinichi Itoh and Gerrit Günther and Margarita Russina and Zhilun Lu and Jieming Sheng and Le Wang and Jiucai Wang and Guohua Wang and Qingyong Ren and Chuanying Xi and Wei Tong and Langsheng Ling and Zhengxin Liu and Liusuo Wu and Jiawei Mei and Zhe Qu and Haidong Zhou and Xiaoqun Wang and Je-Geun Park and Yuan Wan and Jie Ma},
journal= {arXiv preprint arXiv:2012.00940},
year = {2021}
}
Comments
19 pages and 5 figures for main text. 16 pages and 6 figures for Supplemental Material