受挫磁体中自旋阻塞与自旋玻璃态的零点熵
Zero-point entropies of spin-jam and spin-glass states in a frustrated magnet
AI总结：
本文通过热力学研究揭示了受挫磁体中磁零点熵随非磁性离子掺杂的变化机制，阐明了自旋阻塞态与弱耦合孤立自旋的联合效应及其在量子磁性中的共存现象。
摘要：
对典型准二维受挫磁体Ba$_2$Sn$_2$ZnCr$_{7p}$Ga$_{10-7p}$O$_{22}$的热力学研究表明，当磁性Cr$^{3+}$离子排列在双锥体三角网络中时，$p=0.98$时的磁零点熵为Cr$^{3+}$磁矩完全无序时预期熵的55(1)\%。此外，结合先前的中子散射研究及自旋阻塞的周长标度熵，分析揭示，随着$p$减小（即非磁性Ga$^{3+}$离子掺杂），磁零点熵的变化可由自旋阻塞态零点熵与弱耦合孤立自旋的联合效应很好地解释，阐明了量子磁性中两类自旋态的共存。
英文摘要：
Thermodynamics studies of a prototypical quasi-two-dimensional frustrated magnet Ba$_2$Sn$_2$ZnCr$_{7p}$Ga$_{10-7p}$O$_{22}$ where the magnetic Cr$^{3+}$ ions are arranged in a triangular network of bipyramids show that the magnetic zero-point entropy for $p=0.98$ is 55(1)\% of the entropy expected when the Cr$^{3+}$ moments are fully disordered. Furthermore, when combined with a previous neutron scattering study and the perimeter scaling entropy of a spin jam, the analysis reveals that with decreasing $p$, i.e., doping of the nonmagnetic Ga$^{3+}$ ions, the variation in the magnetic zero-point entropy can be well explained by the combined effects of the zero-point entropy of the spin jam state and that of weakly coupled orphan spins, shedding light on the coexistence of the two types of spin states in quantum magnetism.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
