High-Precision Spin-Resolved Electronic Structures of Si(110)-"16x2" chiral surfaces

这一建议用于旅费和生活经费，以使Seddon教授（PI）和一名研究生能够在Elettra同步加速器（意大利）的APE-LE光发射站进行实验工作（最近获得了光束时间）。在Elettra工作的旅行、住宿和生活津贴过去是由Calipso跨国准入计划提供的，不幸的是，该计划已不再提供。在这个波束时间内，我们的目标是对Si(110)-“16x2”表面进行精确、高精度的电子自旋极化测量，我们的计算预测，由于表面手性，Si(110)-“16x2”表面将表现出较小的极化。与以前在Elettra的实验工作相比，拟议的实验方案已经得到了推进，以确保产生明确的数据。结果表明，两个对映体表面表现出相互“镜像”的自旋极化，这将是一个强大的结果，将对自旋电子学领域产生重大影响，因为它提高了极化电子可以注入硅基电子元件的可能性，而不需要磁性覆盖层等。这项工作是我们正在进行的项目的关键部分，探索手性和Rashba效应在半导体材料中的表现特别关注自旋注入/检测。

This proposal is for travel and subsistence funds to enable Prof. Seddon (the PI) and a post-graduate student to carry out experimental work (for which beamtime has recently been awarded) on the APE-LE photoemission station at the Elettra synchrotron (Italy). Travel, accommodation and subsistence for work at Elettra used to be provided under the Calipso Transnational Access program, which unfortunately is no longer available.In this beamtime we aim to perform accurate, high-precision electron spin polarisation measurements for Si(110)-"16x2" surfaces that our calculations have predicted will exhibit small polarisations due to the surface chirality. The proposed experimental programme has been advanced, compared with previous experimental work at Elettra, in order to ensure the generation of unequivocal data. Results indicating that the two enantiomeric surfaces exhibit spin polarisations that 'mirror' each other would be a robust result that would have a significant impact in the field of spintronics as it raises the possibility that polarised electrons could be injected into silicon based electronics components without the need for magnetic overlayers etc.This work is a key part of our on-going project exploring manifestations of chirality and the Rashba effect in semiconductor materials with a particular focus on spin injection/detection.