Microscopic theory of spin-splittings and ballistic spin currents in semiconductor nanostructures

半导体纳米结构中自旋分裂和弹道自旋流的微观理论

• 批准号: 41099562
• 负责人: Professor Dr. Peter Vogl
• 金额: --
• 依托单位: Walter Schottky Institut für physikalische Grundlagen der Halbleiterelektronik (WSI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/41099562?language=en
• 关键词: Microscopic; theory; spin; splittings; ballistic

This project aims at quantitatively predicting the spin-orbit-interaction induced intrinsic spin-Hall effect, spin-orbit induced magnetizations, spin precession times, g-factors, and spin-polarized electron currents as well as the quantum spin-Hall effect in nanostructured two-dimensional electron or hole gases with and without the presence of magnetic fields. The calculations will be based on a novel spin-resolved quantum transport theory, the multi scattering Buettiker probe (MSB) model, that we have recently developed. It treats quantum interference and coherence on the same footing as incoherent scattering and allows one to incorporate inhomogeneous magnetic fields in a non-perturbative manner. The main methodical objective will consist in extending this method to consistently treat many electronic bands as necessary for topological insulators. The underlying electronic structure scheme is the atomistic relativistic empirical tight-binding method.

本项目旨在定量预测有和无磁场情况下纳米结构二维电子或空穴气体中自旋-轨道相互作用诱导的本征自旋-霍尔效应、自旋-轨道诱导磁化、自旋进动时间、g因子、自旋极化电流以及量子自旋-霍尔效应。计算将基于我们最近开发的一种新的自旋分辨量子输运理论，即多散射比提克探测器（MSB）模型。它将量子干涉和相干与非相干散射放在同一基础上，并允许人们以非摄动的方式合并非均匀磁场。主要的方法目标将包括扩展该方法，以一致地处理拓扑绝缘体所需的许多电子带。基本的电子结构方案是原子相对论经验紧密结合方法。