The transition metal based oxide YBaCo3FeO7 is structurally related to the mineral Swedenborgite SbNaBe4O7, a polar non-centrosymmetric crystal system. The magnetic Co3Fe sublattice consists of a tetrahedral network containing kagome-like layers with trigonal interlayer sites. This geometry causes frustration effects for magnetic ordering, which were investigated by magnetization measurements, Mössbauer spectroscopy, polarized neutron diffraction, and neutron spectroscopy. Magnetization measurement and neutron diffraction do not show long range ordering even at low temperature (1 K) although a strong antiferromagnetic coupling (~2000 K) is deduced from the magnetic susceptibility. Below 590 K, we observe two features, a spontaneous weak anisotropic magnetization hysteresis along the polar crystallographic axis and a hyperfine field on the Fe kagome sites, whereas the Fe spins on the interlayer sites remain idle. Below ~50 K, the onset of a hyperfine field shows the development of moments static on the Mössbauer time scale also for the Fe interlayer sites. Simultaneously, an increase of spin correlations is found by polarized neutron diffraction. The relaxation part of the dynamic response has been further investigated by high-resolution neutron spectroscopy, which reveals that the spin correlations start to freeze in below ~50 K. Monte Carlo simulations show that the neutron scattering results at lower temperatures are compatible with a recent proposal that the particular geometric frustration in the Swedenborgite structure promotes quasi one dimensional partial order.
Anomalous magnetotransport in a non-collinear correlated kagome ferromagnet MgMn6Sn6
S. N. Bose National Centre for Basic Sciences（S.N. 玻色基础科学国家中心）；Max Planck Institute for Chemical Physics of Solids（马克斯·普朗克固体化学物理研究所）；ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory（ISIS中子与μ子源，科学与技术设施委员会，拉瑟福德阿普尔顿实验室）；School of Physical Sciences, Indian Institute of Technology Goa（印度果阿理工学院物理科学学院）
Role of electronic correlations in the Kagome lattice superconductor LaRh$_3$B$_2$
LaRh $_3$ B $_2$以层状结构结晶，其中Rh原子形成完美的Kagome晶格。该材料在$T_c \approx 2.6$ ~K处表现出超导性，没有密度波不稳定性的特征。我们报告我们的测量的电子输运，磁化强度和热容量在正常和超导状态，并得出正常和超导参数。从电子能带结构的第一性原理计算，我们确定主要由Rh $d$轨道形成的Kagome带的所有功能：一个平坦的带，狄拉克锥，和范霍夫奇点。声子色散和电子-声子耦合的计算表明LaRh $_3$ B $_2$和AV $_3$ Sb $_5$（A=K，Cs，Rb）之间有很强的相似性。对于LaRh $_3$ B $_2$，它与观察到的$T_c$定量匹配，支持传统的声子介导的配对机制。通过与$A$ V $_3$ Sb $_5$家族的比较，我们推测LaRh $_3$ B $_2$中电子相关的重要性降低。
Orbital-selective band evolution and out-of-plane correlation in the FeGe-family kagome antiferromagnet ScFe$_6$Ge$_6$
Seoul National University（首尔大学）；ShanghaiTech University（上海科技大学）；University of Science and Technology of China（中国科学技术大学）；Sejong University（世宗大学）；Korea Institute of Science and Technology（韩国科学技术院）；National Institutes for Quantum Science and Technology（量子科学技术研究机构）；Shanghai Advanced Research Institute, Chinese Academy of Sciences（中国科学院上海高等研究院）
Observation of multiple flat bands and van Hove singularities in the distorted kagome metal NdTi3Bi4
University of Central Florida（中佛罗里达大学）；Oak Ridge National Laboratory（橡树岭国家实验室）；Northeastern University（东北大学）；S.N. Bose National Center for Basic Sciences（S.N. 玻色基础科学国家中心）
A Kagome-Derived Mosaic Lattice Family A3V9Te13 (A = Cs, Rb) with Tunable Strong Electronic Correlations
Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交大李政道研究所）；School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院）；Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology（南方科技大学量子科学工程学院）；International Quantum Academy（国际量子科学院）
Correlated topological band structures of the kagome altermagnets Mn$_3X$ ($X=$ Sn, Ge, Ga)
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）；Institute of Quantum Materials and Physics, Henan Academy of Sciences（河南省科学院量子材料物理研究所）；Institute for Applied Physics, University of Science and Technology Beijing（北京科技大学应用物理学院）；Songshan Lake Materials Laboratory（松山湖材料实验室）
