应变kagome（笼目）条带中的磁响应与反铁磁关联
Magnetic response and antiferromagnetic correlations in strained kagome ribbons
AI总结：
本研究通过密度矩阵重整化群计算，探究了应变下kagome晶格条带中强耦合Hubbard模型的磁特性，揭示了应变对反铁磁键分布、阻挫与关联的调控作用，为实验探测相关系统的对称性与相互作用提供了思路。
摘要：
我们研究了半填充、受机械张力作用的kagome（笼目）晶格条带中强耦合Hubbard模型的物理特性。已知在无应变时，系统的晶格对称性与强电子相互作用会引发磁阻挫。当施加单轴应变时，条带会呈现多种构型，其能量振荡取决于应变轴的方向。我们通过密度矩阵重整化群（density-matrix renormalization-group）计算得到了系统的基态。研究发现，该系统的特征是遍布晶格的强反铁磁键，其方向和模式取决于应变方向，且可能与易极化位点共存——这些位点与相邻位点仅存在弱关联。我们确定了能很好反映系统应变与相互作用依赖关系的阻挫和关联度量。这些结果表明，可通过实验探究应变相关的磁化率，以帮助探测对称性与相互作用在这类系统中的作用。
英文摘要：
We study the physics of the strong-coupling Hubbard model in a kagome lattice ribbon under mechanical tension and half-filling. It is known that in the absence of strain, the lattice symmetry of the system and strong electronic interactions induce magnetic frustration. As uniaxial strain is applied, the ribbon exhibits various configurations with energy oscillations that depend on the direction of the strain axis. The ground states are obtained by density-matrix renormalization-group calculations. We find that the system is characterized by strong antiferromagnetic bonds distributed throughout the lattice in directions and patterns that depend on strain directions and may coexist with easily polarizable sites that are only weakly correlated to their neighbors. We identify frustration and correlation measures that follow the strain and interaction dependence of the system well. These results illustrate that strain-dependent magnetic susceptibility could be explored experimentally to help probe the role of symmetry and interactions in these systems.
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