论文标题
在Shastry-Sutherland化合物SRCU2（BO3）2UP中揭示新的量子相到饱和磁场
Unveiling new quantum phases in the Shastry-Sutherland compound SrCu2(BO3)2up to the saturation magnetic field
论文作者
论文摘要
在磁场下，量子磁体通常会以各种阶的阶段进行外来的相变。在Shastry-Sutherland化合物SRCU2（BO3）2中发现了一系列分数磁化高原的序列在对量子材料的高场研究中起着核心作用，但到目前为止，该系统只能探究该系统的一半，最多是磁性化的饱和值。在这里，我们报告了该化合物的第一个实验和理论研究，直到140 T及以后的饱和磁场。使用超声和磁截图技术与广泛的张量 - 网络计算（IPEP）相结合，在1/2高原和饱和度之间揭示了几个自旋 - 苏皮溶液相（1/1 Plateau）。相当值得注意的是，1/2高原的声速表现出-50％的急剧降低，与棋盘型木棒晶体的四方到四方的不稳定性有关。该范式量子系统的揭幕性质是探索在极端条件下出现的异国量子状态的新里程碑。
Under magnetic fields, quantum magnets often undergo exotic phase transitions with various kinds of order. The discovery of a sequence of fractional magnetization plateaus in the Shastry-Sutherland compound SrCu2(BO3)2 has played a central role in the high-field research on quantum materials, but so far this system could only be probed up to half the saturation value of the magnetization. Here, we report the first experimental and theoretical investigation of this compound up to the saturation magnetic field of 140 T and beyond. Using ultrasound and magnetostriction techniques combined with extensive tensor-network calculations (iPEPS), several spin-supersolid phases are revealed between the 1/2 plateau and saturation (1/1 plateau). Quite remarkably, the sound velocity of the 1/2 plateau exhibits a drastic decrease of -50%, related to the tetragonal-to-orthorhombic instability of the checkerboard-type magnon crystal. The unveiled nature of this paradigmatic quantum system is a new milestone for exploring exotic quantum states of matter emerging in extreme conditions.
