Anisotropic magnetoelastic coupling in the honeycomb magnet Na$_3$Co$_2$SbO$_6$
University of Augsburg（奥格斯堡大学）；Max-Planck-Institute for Solid State Research（马克斯·普朗克固体研究所）
Prashanta K. Mukharjee, Sebastian Erdmann, Lichen Wang, Julian Kaiser, Anton Jesche, Pascal Puphal, Masahiko Isobe, Matthias Hepting, Bernhard Keimer, Philipp G… 展开作者
Prashanta K. Mukharjee, Sebastian Erdmann, Lichen Wang, Julian Kaiser, Anton Jesche, Pascal Puphal, Masahiko Isobe, Matthias Hepting, Bernhard Keimer, Philipp Gegenwart, Alexander A. Tsirlin
We present magnetization and dilatometry measurements on the honeycomb cobaltate Na$_3$Co$_2$SbO$_6$ and map out its detailed field-temperature phase diagram down to sub-Kelvin temperatures. Our data for in-plane magnetic fields show a strongly anisotropic $c^{*}$-axis lattice response, which is dominated by the variation of Co--O--Co bond angles according to \textit{ab initio} calculations. At $T = 0.4$~K, the magnetization $M(B)$ exhibits step-like features that are also highly anisotropic. In the case of $B \parallel b$, a small hysteresis observed around the second field-induced magnetic transition ($B_{c2}$) indicates its first-order character, whereas divergence of the magnetic Grüneisen parameter at $B_{c2}$ is suppressed upon cooling and signals the absence of quantum critical behavior upon entering the field-polarized state. None of our thermodynamic measurements provide evidence for a field-induced quantum spin liquid state near or above $B_{c2}$.
Coupled dimerized alternating-bond quantum spin chains in the distorted honeycomb-lattice magnet Cu$_5$SbO$_6$
Mahidol University（马希隆大学）；Thailand Center of Excellence in Physics, Commission of Higher Education（泰国物理卓越中心，高等教育委员会）；Tohoku University（东北大学）；Tokyo University of Science（东京科学大学）；National Taiwan University（台湾大学）；Taiwan Consortium of Emergent Crystalline Materials, National Science and Technology Council（台湾新兴晶体材料联盟，国家科学技术委员会）；Center of Atomic Initiative for New Materials, National Taiwan University（台湾大学新物质原子倡议中心）；J-PARC Center（J-PARC中心）；University of Maryland（马里兰大学）；National Institute of Standards and Technology（美国国家标准与技术研究院）
Magnetoelastic honeycomb fragmentation in VI$_{3}$
University of Edinburgh（爱丁堡大学）；NIST Center for Neutron Research（美国国家标准与技术研究院中子研究中心）；University of Maryland, College Park（马里兰大学帕克分校）；ISIS Facility, Rutherford Appleton Laboratory（卢瑟福·阿普尔顿实验室 ISIS 设施）；European Synchrotron Radiation Facility（欧洲同步辐射装置）
Kitaev interactions in the Co honeycomb antiferromagnets Na$_3$Co$_2$SbO$_6$ and Na$_2$Co$_2$TeO$_6$
Co $^{2+}$离子在八面体晶体场，稳定一个j $_{eff}$ = 1/2基态的轨道自由度，并已最近提出实现Kitaev相互作用，预测我们已经通过调查两个钴蜂窝晶格化合物，钠$_2$ Co $_2$ TeO $_6$和钠$_3$ Co $_2$ SbO $_6$，使用非弹性中子散射自旋动力学测试。我们使用线性自旋波理论表明，磁谱可以复制与自旋哈密顿量，包括占主导地位的Kitaev最近邻相互作用，较弱的海森堡相互作用的第三个邻居和键依赖的非对角交换相互作用。除了Kitaev相互作用，单独会引起量子自旋液体状态，这些额外的耦合的存在是负责在低温下观察到的两种化合物的磁共振型长程磁有序。这些结果提供了证据，实现Kitaev型耦合在钴基材料，尽管托管一个较弱的自旋轨道耦合比他们的4D和5D的同行。
Inelastic neutron scattering of the layered Kitaev ferromagnet Li$_3$Co$_2$SbO$_6$
University of Melbourne（墨尔本大学）；Australian Nuclear Science and Technology Organisation (ANSTO)（澳大利亚核科学与技术组织）；The University of Sydney（悉尼大学）；University of Warwick（华威大学）；DESY（德国电子同步加速器研究所）
Relevance of on-site and intersite Coulomb interactions in the Kitaev-Heisenberg magnet Na$_3$Co$_2$SbO$_6$
Institute for Theoretical Solid State Physics, Leibniz IFW Dresden（德累斯顿亥姆霍兹中心莱布尼茨研究所理论固态物理研究所）；Department of Physics, Karpagam Academy of Higher Education（卡尔帕甘高等教育学院物理系）；Centre for Computational Physics, Karpagam Academy of Higher Education（卡尔帕甘高等教育学院计算物理中心）；School of Physics, University of Melbourne（墨尔本大学物理学院）；Department of Physics, Technical University Dresden（德累斯顿工业大学物理系）
Successive magnetic transitions and multiferroicity in layered honeycomb BiCrTeO$_{6}$
University of Groningen（格罗宁根大学）；National Sun Yat-sen University（国立中山大学）；Sungkyunkwan University（成均馆大学）；National Synchrotron Radiation Research Center（国家同步辐射研究中心）；National Yang Ming Chiao Tung University（国立阳明交通大学）
Competing Interactions and the Effects of Uniaxial Out-of-plane Perturbations in the Honeycomb Antiferromagnet Na$_2$Co$_2$TeO$_6$
Kirchhoff Institute for Physics, Heidelberg University（海德堡大学基尔霍夫物理研究所）；Institute of Physics, Academia Sinica（中央研究院物理学研究所）；Department of Physics, Sungkyunkwan University（成均馆大学物理系）
