Shi Zhenzhong, Dissanayake Sachith, Corboz Philippe, Steinhardt William, Graf David, Silevitch D M, Dabkowska Hanna A, Rosenbaum T F, Mila Frédéric, Haravifard Sara
Department of Physics, Duke University, Durham, NC, 27708, USA.
Institute for Advanced Study, School of Physical Science and Technology, Soochow University, Suzhou, 215006, China.
Nat Commun. 2022 Apr 28;13(1):2301. doi: 10.1038/s41467-022-30036-w.
The 2-dimensional layered oxide material SrCu(BO), long studied as a realization of the Shastry-Sutherland spin topology, exhibits a range of intriguing physics as a function of both hydrostatic pressure and magnetic field, with a still debated intermediate plaquette phase appearing at approximately 20 kbar and a possible deconfined critical point at higher pressure. Here, we employ a tunnel diode oscillator (TDO) technique to probe the behavior in the combined extreme conditions of high pressure, high magnetic field, and low temperature. We reveal an extensive phase space consisting of multiple magnetic analogs of the elusive supersolid phase and a magnetization plateau. In particular, a 10 × 2 supersolid and a 1/5 plateau, identified by infinite Projected Entangled Pair States (iPEPS) calculations, are found to rely on the presence of both magnetic and non-magnetic particles in the sea of dimer singlets. These states are best understood as descendants of the full-plaquette phase, the leading candidate for the intermediate phase of SrCu(BO).
二维层状氧化物材料SrCu(BO)，长期以来作为沙斯特里 - 萨瑟兰自旋拓扑结构的一种实现而被研究，它展现出一系列有趣的物理性质，这些性质是静水压力和磁场的函数，在大约20千巴时出现一个仍存在争议的中间格子相，在更高压力下可能存在一个解禁临界点。在此，我们采用隧道二极管振荡器（TDO）技术来探测在高压、高磁场和低温的联合极端条件下的行为。我们揭示了一个由难以捉摸的超固相的多个磁类似物和一个磁化平台组成的广阔相空间。特别是，通过无限投影纠缠对态（iPEPS）计算确定的一个10×2超固相和一个1/5平台，被发现依赖于二聚体单重态海洋中磁性和非磁性粒子的同时存在。这些态最好被理解为全格子相的衍生物，全格子相是SrCu(BO)中间相的主要候选者。
