We study the ground-state properties of the S=1/2 Heisenberg models on the quasi-onedimensional kagome strip lattices by the exact diagonalization and density matrix renormalization group methods. The models with two different strip widths share the same lattice structure in their inner part with the spatially anisotropic two-dimensional kagome lattice. When there is no magnetic frustration, the well-known Lieb-Mattis ferrimagnetic state is realized in both models. When the strength of magnetic frustration is increased, on the other hand, the Lieb-Mattis-type ferrimagnetism is collapsed. We find that there exists a non-Lieb-Mattis ferrimagnetic state between the Lieb-Mattis ferrimagnetic state and the nonmagnetic ground state. The local magnetization clearly shows an incommensurate modulation with long-distance periodicity in the non-Lieb-Mattis ferrimagnetic state. The intermediate non-Lieb-Mattis ferrimagnetic state occurs irrespective of strip width, which suggests that the intermediate phase of the two-dimensional kagome lattice is also the non-Lieb-Mattis-type ferrimagnetism.
Domain structure dynamics in the ferromagnetic Kagome-lattice Weyl semimetal Co$_3$Sn$_2$S$_2$
Co $_3$ Sn $_2$ S $_2$是一种Weyl半金属，由Kagome晶格层组成，在177 K以下从高温顺磁相转变为低温铁磁相。相变通过中间的非平凡磁相发生，所谓的“A”相刚好低于居里温度。“A”相早期与竞争性反铁磁相，自旋玻璃相和某些间接测量表明磁性Skyrmions在这个阶段的可能性。我们用磁力显微镜观察了Co $_3$ Sn $_2$ S $_2$单晶在不同温度、磁场和场角下的磁畴结构。在低温下，我们观察到条纹域表示存在单轴各向异性。在130 K以上，畴壁变得可移动，当磁场沿$c$轴比沿$a-b$平面增加时，畴壁趋向于相对容易地排列.我们的详细的研究领域依赖的域动力学揭示，低于$T_c$的相变的异常性质是占主导地位的畴壁运动。
Evolution from three-dimensional charge density wave to one-dimensional stripe order in CsV$_{3-x}$Ti$_x$Sb$_5$
Guangdong University of Education（广东教育学院）；International Center for Quantum Materials, School of Physics, Peking University（北京大学物理学院量子材料国际中心）；State Key Laboratory of Quantum Functional Materials, School of Physical Science and Technology, ShanghaiTech University（上海科技大学物理科学与技术学院量子功能材料国家重点实验室）；ShanghaiTech Laboratory for Topological Physics, ShanghaiTech University（上海科技大学拓扑物理实验室）；Beijing National Center for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所北京凝聚态物理国家研究中心）；School of Physical Sciences, University of Chinese Academy of Sciences（中国科学院大学物理科学学院）
Altermagnetism and its induced higher-order topology on the Lieb lattice
School of Physics, Beihang University（北京航空航天大学物理学院）；School of Intelligence Science and Technology, Nanjing University of Science and Technology（南京理工大学智能科学与技术学院）；Faculty of Arts and Sciences, Beijing Normal University, Zhuhai（北京师范大学珠海分校文理学院）；School of Physics and Astronomy, Beijing Normal University（北京师范大学物理与天文学院）；Hefei National Laboratory（合肥国家实验室）；International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China（中国科学技术大学量子功能材料国际设计中心）；Research Laboratory for Quantum Materials, Department of Applied Physics, The Hong Kong Polytechnic University（香港理工大学应用物理系量子材料研究实验室）
Ground states of quantum XY dipoles on the Archimedean lattices
Harvard University（哈佛大学）；Carnegie Mellon University（卡内基梅隆大学）；Technical University of Munich（慕尼黑工业大学）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；University of California, Berkeley（加州大学伯克利分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）
