Introducing the monoclinic polymorph of the Kitaev magnet Na$_{2}$Co$_{2}$TeO$_{6}$
| Autor: | Dufault, Emilie, Bahrami, Faranak, Streeter, Alenna, Yao, Xiaohan, Gonzalez, Enrique, Zhang, Qiang, Tafti, Fazel |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 108, 064405 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.108.064405 |
| Popis: | Recent theoretical studies have suggested that the low-energy Hamiltonian of honeycomb cobaltate systems could be dominated by anisotropic Kitaev interactions. Motivated by the theory, a honeycomb layered material Na$_{2}$Co$_{2}$TeO$_{6}$ with a hexagonal unit cell has been studied and found to exhibit antiferromagnetic (AFM) ordering at 27 K with two spin reorientation transitions at 15 and 5 K. Here we report a monoclinic polymorph of Na$_{2}$Co$_{2}$TeO$_{6}$, also with honeycomb layered structure but with a single AFM transition at 9.6 K and without spin reorientation transitions at lower temperatures. Using neutron diffraction, we identify an in-plane zigzag AFM order in the ground-state with the spins canted out of the honeycomb planes and ferromagnetically coupled between them. The zigzag order is suppressed by a magnetic field of 6 T. Comment: 7 Figures, 3 tables |
| Databáze: | arXiv |
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