标题： 反铁磁 Shastry-Sutherland 富勒烯网络 显示英文标题

标题： Altermagnetic Shastry-Sutherland fullerene networks

摘要： 分子构建模块为实现奇异量子相提供了一个通用的平台。 以电中性纯碳富勒烯分子为例，我们设计了在Shastry-Sutherland晶格中的反铁磁C$_{40}$单层。 一个未配对电子的共振结构在分子的两侧形成了有效的自旋-1/2簇，当旋转成二维金红石型晶体结构后，形成反铁磁基态。 我们展示了$d$波段的自旋极化电子带结构分裂和强手性分裂的磁振子带。 最有趣的是，有效的自旋-1/2簇形成了Shastry-Sutherland模型，其相图包含反铁磁、量子自旋液体、平面簇和二聚体相，可以通过适度的双轴应变轻松实现。 我们的发现表明磁性富勒烯单层是一个可调节的平台，用于奇异量子磁性和自旋电子学应用。 显示英文摘要

摘要： Molecular building blocks provide a versatile platform for realising exotic quantum phases. Using charge neutral, pure carbon fullerene molecules as an example, we design altermagnetic C$_{40}$ monolayers in Shastry-Sutherland lattice. The resonance structure of one unpaired electron leads to an effective spin-1/2 cluster on both long sides of the molecule, which, after rotating into a 2D rutile-like crystal structure, forms altermagnetic ground state. We show $d$-wave spitting of the spin-polarised electronic band structure and strong chiral-split magnon bands. Most interestingly, the effective spin-1/2 clusters form the Shastry-Sutherland model with a rich phase diagram including altermagenti, quantum spin liquid, plaquette, and dimer phases, which can be easily accessed to via moderate bi-axial strains. Our findings present magnetic fullerene monolayers as a tunable platform for exotic quantum magnetism and spintronic applications.