论文标题
Mott Point周围的异常厚的金属绝缘体域壁
Unusually thick metal-insulator domain walls around the Mott point
论文作者
论文摘要
许多Mott系统在有限温度下具有一阶金属绝缘体过渡，相关的相共存区域显示不均匀性和局部相分离。在这里，人们通常会发现各个阶段的“气泡”或域，这些阶段被厚或脂肪的域壁隔开，如成像实验和最新理论建模所揭示的那样。为了深入了解这种意外行为，我们对动态平均场理论框架内的Mott Point周围此类金属 - 绝缘体域壁的结构进行了系统的模型研究。我们的研究表明，产生这种“脂肪”域壁的机制可以追溯到强烈的磁性挫败感，这预计将是“自旋液体” Mott Systems的强大特征。
Many Mott systems feature a first-order metal-insulator transition at finite temperatures, with an associated phase coexistence region displaying inhomogeneities and local phase separation. Here one typically finds "bubbles" or domains of the respective phases, which are separated by surprisingly thick, or fat, domain walls, as revealed both by imaging experiments and recent theoretical modeling. To gain insight into this unexpected behavior, we perform a systematic model study of the structure of such metal-insulator domain walls around the Mott point, within the dynamical mean-field theory framework. Our study reveals that a mechanism producing such "fat" domain walls can be traced to strong magnetic frustration, which is expected to be a robust feature of "spin-liquid" Mott systems.
