The spin-glass behavior in the ferromagnetic phase of $\mathrm{Tm_2Cu_2In}$ was investigated by dc-, ac-magnetization, and non-equilibrium dynamics characterizations. Arc-melted polycrystalline compound of $\mathrm{Tm_2Cu_2In}$ crystallizes in $\mathrm{Mo_2FeB_2}$-type tetragonal structure (space group $P_4/mbm$). The temperature variation dc-magnetization exhibits a ferromagnetic behavior with Curie temperature $T_C$ = 32.5 K. The zero-field cooled (ZFC) and field cooled (FC) magnetic curves show a thermomagnetic irreversible behavior below $T_C$. The field dependence of irreversible temperature follows Almeida-Thouless line. The frequency and ac-driven field-dependent anomalies in ac-susceptibility results indicate the existence of spin-glass state in $\mathrm{Tm_2Cu_2In}$. The time dependence of magnetization further supports the spin-glass behavior observed in $\mathrm{Tm_2Cu_2In}$. The frequency dependence of the freezing temperature in the real part of ac-susceptibility has been analyzed on the basis power-law divergence and Vogel-Fulcher law. The obtained results revealed that $\mathrm{Tm_2Cu_2In}$ belongs to a ferromagnetic canonical spin-glass class of compounds.
Electronic Transport on the Shastry-Sutherland Lattice in Ising-type Rare Earth Tetraborides
在存在磁场的情况下，受抑自旋系统可以在饱和磁化强度的分数值处表现出平台。这样的平台状态是稳定的经典和量子机制，包括有序无序，三重态结晶，和各种竞争秩序的影响。在导电系统的情况下，自由电子代表了对平台态的敏锐探测。本文研究了Ising型稀土四硼化物$R$ B $_4$（$R=$ Er，Tm）的电输运性质。我们发现，纵向和横向折射率反映了静态和动态平台结构的散射。我们模拟这些结果与预期的强单轴各向异性在定量水平一致，提供了一个框架的研究平台状态的金属阻挫系统。
Giant Magnetocaloric Effect in a High-Spin Shastry-Sutherland Dipolar Magnet
Ganjiang Innovation Academy, Chinese Academy of Sciences（中国科学院赣江创新研究院）；University of Science and Technology of China（中国科学技术大学）；High Magnetic Field Laboratory, Chinese Academy of Sciences（中国科学院合肥物质科学研究院高磁场实验室）；Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Anhui University（安徽大学）；Beijing Institute of Technology（北京理工大学）
Evidence for a $\mathbb{Z}_{2}$ Dirac spin liquid in the generalized Shastry-Sutherland model
Julius-Maximilians-Universität Würzburg（维尔茨堡大学）；Indian Institute of Technology Madras（马德拉斯理工学院）；Goethe Universität Frankfurt（法兰克福歌德大学）；Univ Toulouse, CNRS, Laboratoire de Physique Théorique（图卢兹大学，法国国家科学研究中心，理论物理实验室）；Institute for Solid State Physics and Optics, Wigner Research Centre for Physics（固体物理与光学研究所，维格纳物理学研究中心）
