包含量子环的低维结构中的电子自旋输运问题

To control spin transport in low-dimensional quantum structures is an important subject in semicondutor spintronics, also one of main obstacles which impact realization of corresponding spin devices. In various quantum waveguides in two dimensional electron gas, quantum ring has come to wide attention, because there are many interesting phenomenons which can be used. In this project, we will study the spin transport of electrons in quantum ring structural system in several respects, including: the variation law of spin coductivity and spin polarization in different kinds of quantum rings; the modulation of spin transport in a chaim of quantum ring or in quantum ring array. This project is of great importance and will promote the development of spin device theory and spin transport theory in low-dimensional materials.

在低维量子结构中控制电子的自旋输运是半导体自旋电子学中的重要课题，也是自旋器件能否实现的主要障碍之一。在二维电子气中的各种量子结构中，量子环是被广泛关注的一种，这是由于其拥有许多能被利用的有趣现象。本项目拟从多个方面开展量子环结构体现中电子自旋输运问题的研究，主要包括：不同量子环中电子自旋电导率及自旋极化的变化规律；量子环组成的环形列和阵列中自旋输运的调制等。本项目有着重要的理论价值和潜在应用价值，将有助于推动自旋器件理论和低维材料中自旋输运理论向前发展。

我们对低维结构中Rashba电子自旋输运和自旋电导的调控进行了多项理论研究。从量子环体系到二维波导两个方面开展了系统的研究，取得了一系列有特色的创新性成果。对自旋翻转器的实现，一维量子环体系的自旋输运和自旋电导的调制等方面都得到了有意义的理论结果，对于半导体自旋器件的制作有较大的理论指导意义。