我们报告的SrRu $_2$ O $_6$具有非常高的N $\acute{\textrm{e}}$ el温度的层状材料的拉曼测量结果。没有额外的声子模式被检测到的温度下的磁转变，从而排除了降低的对称性的磁有序相。当温度接近$T_N$时，一些声子的软化和阻尼的不寻常增加表明在$T\geq300K$出现了连续的相互作用的电子激发。我们还观察到在2050 cm $^{-1}$处的强烈拉曼响应。极化依赖性的分析和与现有的理论数据的比较表明，这个峰可能起源于分子轨道之间的跃迁先前提出的SrRu $_2$ O $_6$的磁性。
英文摘要：
We report results of the Raman measurements for SrRu$_2$O$_6$ having extraordinary high N$\acute{\textrm{e}}$el temperature for a layered material. No additional phonon modes were detected at the temperature of magnetic transition thus excluding lowering of the symmetry in the magnetically ordered phase. An unusual increase in softening and damping of some phonons as the temperature approaches $T_N$ indicate the appearance of a continuum of interacting electronic excitations at $T\geq300K$. We also observe an intensive Raman response at 2050 cm$^{-1}$. Analysis of the polarization dependence and comparison with available theoretical data shows that this peak likely originates from the transitions between molecular orbitals previously proposed to explain the magnetic properties of SrRu$_2$O$_6$.
Imaging the Néel Vector in Two-Dimensional Antiferromagnets using Antisymmetric Compton Scattering
Center for Quantum Matter, School of Physics, Zhejiang University（浙江大学物理学院量子物质中心）；Tianjin Key Laboratory of Quantum Optics and Intelligent Photonics, School of Science, Tianjin University of Technology（天津工业大学理学院量子光学与智能光子学天津市重点实验室）
Néel-order-dependent transverse transport in noncoplanar antiferromagnet $\text{MnTe}_{2}$
Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE), School of Physics, Beijing Institute of Technology（北京理工大学 光电量子架构与测量教育部重点实验室 物理学院）；International Center for Quantum Materials, Beijing Institute of Technology（北京理工大学 国际量子材料中心）
Evaluation of Neel temperatures from fully self-consistent broken-symmetry GW and high-temperature expansion: application to cubic transition-metal oxides
Spin-phonon interactions revisited: Far-infrared emission, Raman scattering, and high-resolution x-ray diffraction at the Néel temperature in LaFeO3
Universidad Nacional de La Plata（拉普拉塔国立大学）；European Synchrotron Radiation Facility (ESRF)（欧洲同步辐射装置）；Université Orléans（奥尔良大学）；Instituto de Ciencia de Materiales de Madrid, CSIC（马德里材料科学研究所）
Atomic-Scale Detection of Néel Vector Switching in the Single-Layer A-type Antiferromagnet Cr2S3-2D
II. Physikalisches Institut, Universität zu Köln（科隆大学第二物理研究所）；Institute of Molecular Science, University of Valencia（瓦伦西亚大学分子科学研究所）；Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf（德累斯顿-罗斯多夫亥姆霍兹中心离子束物理与材料研究所）；ALBA Synchrotron Light Source（阿尔巴同步辐射光源）
Spin Dependence of the Critical Concentration for the Neel State of 2D Impure Heisenberg Antiferromagnets
本文应用自旋波理论和相干势近似，研究了正方晶格上含杂质的自旋S海森堡反铁磁体。用S（1-x）代替S，并采用相干势近似处理交换相互作用，其中x为杂质浓度，从而考虑了杂质的影响。在T=0时，对于S=1/2，Neel态的临界杂质浓度xc为0.303，渗滤阈值xp为0.500。在xc<x =1时的基态<xp is the disordered state with the spin gap. For S>，长程Neel序在xp=0.500时消失.这些结果定性地解释了La_2Cu（1-x）Mg（x）O_4（S=1/2）和K_2Mn（1-x）Mg（x）F_4（S=5/2）的实验结果。这些材料之间的xc的差异是由杂质掺杂导致的有效自旋的幅度减小引起的。La_2Cu（1-x）Mg（x）O_4在xc<x<xp的低温下可以观察到自旋带隙。
Electrical Probing of Sub-Néel Spin Dynamics in Two-Dimensional Antiferromagnets Using Graphene Heterostructures
Universidad Autónoma de Madrid（马德里自治大学）；Universidad de Sevilla（塞维利亚大学）；Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC—Universidad de Zaragoza（阿拉贡纳米科学与材料研究所，西班牙国家研究委员会—萨拉戈萨大学）；Condensed Matter Physics Center (IFIMAC) and Instituto Universitario de Ciencia de Materiales “Nicolás Cabrera” (INC), Universidad Autónoma de Madrid（凝聚态物理中心及“尼古拉斯·卡布雷拉”材料科学大学研究所，马德里自治大学）
