论文标题
排斥哈伯德模型在Kagome晶格上的热力学，磁性和传输特性
Thermodynamic, magnetic and transport properties of the repulsive Hubbard model on the kagome lattice
论文作者
论文摘要
在过去的几十年中，由于其异常特性，磁性挫败感一直存在激烈的争论。例如，Kagome晶格中的挫败感抑制了远程自旋相关性，预计将成为旋转液体系统的候选者。因此，随着超冷原子实验的出现，对沮丧的几何形状的兴趣增加了。鉴于此，在目前的工作中，我们通过公正的量子蒙特卡洛模拟研究了kagome晶格的排斥哈伯德模型。我们检查了其热力学特性，以及系统在有限温度和排斥相互作用的不同值下的磁和运输响应。从这些结果中，我们讨论了绝热冷却的可能发生，超冷系统中非常重要的特征，以及在有限相互作用强度下的金属向绝缘体过渡的存在。我们的发现可能指导kagome晶格上超冷的费米原子的未来实验。
Over the past decades, magnetic frustration has been under intense debate due to its unusual properties. For instance, frustration in the kagome lattice suppresses long range spin correlations and it is expected to be a candidate for a spin liquid system. Therefore, with the advent of experiments with ultra-cold atoms, the interest for frustrated geometries has increased. Given this, in the present work we investigate the repulsive Hubbard model on the kagome lattice by unbiased quantum Monte Carlo simulations. We examine its thermodynamic properties, as well as the magnetic and transport response of the system at finite temperatures and different values of the repulsive interaction. From these results, we discuss the possible occurrence of adiabatic cooling, a quite important feature in ultra-cold systems, and the presence of a metal-to-insulator transition at a finite interaction strength. Our findings may guide future experiments in ultra-cold fermionic atoms on the kagome lattice.
