AI 中文总结
研究传统拓扑绝缘体与拓扑莫特绝缘体界面，用密度矩阵重整化群计算三角晶格霍夫施塔特 - Hubbard 模型，发现界面有无自旋带电激发，通过多种方式识别，还表征了两体相激发。
AI 中文摘要
我们使用广泛的密度矩阵重整化群计算来研究分隔两种拓扑不同绝缘相的界面，以研究具有空间变化相互作用强度的三角晶格霍夫施塔特 - 哈伯德模型，该模型在不同空间区域可实现整数量子霍尔态和手性自旋液体态。我们发现整数量子霍尔 - 手性自旋液体界面存在一种与界面束缚的无自旋带电激发。通过电荷和自旋泵浦以及对低能激发态的直接计算识别出该界面模式。我们还表征了两个相中的体激发，在手性自旋液体中发现了分数化证据，在整数量子霍尔相中发现了自旋三重态激子形成的证据。
英文摘要
We investigate the interface separating two topologically distinct insulating phases of matter using extensive density-matrix renormalization group calculations to study the triangular-lattice Hofstadter-Hubbard model with a spatially varying interaction strength, chosen to realize both integer quantum Hall and chiral spin liquid states in different spatial regions. We find that the integer quantum Hall-chiral spin liquid interface hosts a spinless charged excitation that is bound to the interface. This mode at the interface is identified through charge and spin pumping, and by direct calculations of low-lying excited states. We also characterize bulk excitations in both phases, finding evidence for fractionalization in the chiral spin liquid and for spin-triplet exciton formation in the integer quantum Hall phase.
Comments5+1 pages, 5+2 figures
