We report magneto-transport properties of heterointerfaces between the Mott insulator LaTiO3 and the band insulator SrTiO3 in a delta-doping geometry. At low temperatures, we have found a strong nonlinearity in the magnetic field dependence of the Hall resistivity, which can be effectively controlled by varying the temperature and the electric field. We attribute this effect to multichannel conduction of interfacial charges generated by an electronic reconstruction. In particular, the formation of a highly mobile conduction channel revealed by our data is explained by the greatly increased dielectric permeability of SrTiO3 at low temperatures, and its electric-field dependence reflects the spatial distribution of the quasi-two-dimensional electron gas.
Multichannel topological Kondo models and their low-temperature conductances
Purdue University（普渡大学）；University of Utah（犹他大学）；University of Wisconsin-Madison（威斯康星大学麦迪逊分校）；Max-Planck Institute for Solid State Research（马克斯·普朗克固相研究所）
针对多通道拓扑 Kondo 模型，本文利用表示论与共形场论技术验证了其中间耦合不动点的存在，推广了过度屏蔽概念，并求出了一般 N 情形下的不动点电导与有限温度修正。
Moiré Fractional Chern Insulators III: Hartree-Fock Phase Diagram, Magic Angle Regime for Chern Insulator States, the Role of the Moiré Potential and Goldstone Gaps in Rhombohedral Graphene Superlattices
The "Moiré Capacitor Effect" and Stabilization of Fractional Chern Insulators in Rhombohedral Graphene Superlattices
Center for Computational Quantum Physics, Flatiron Institute（Flatiron研究所计算量子物理中心）；Laboratoire de Physique de l’Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité（巴黎高等师范学院物理实验室，ENS，PSL大学，CNRS，索邦大学，巴黎第七大学，索邦巴黎城）；Department of Physics, Princeton University（普林斯顿大学物理系）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）；Princeton Center for Theoretical Science, Princeton University（普林斯顿大学理论科学中心）；Department of Physics, University of Texas at Dallas（德克萨斯大学达拉斯分校物理系）；IKERBASQUE, Basque Foundation for Science（伊卡巴斯基克，巴斯克科学基金会）；Department of Physics, Massachusetts Institute of Technology（麻省理工学院物理系）
