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

Si(110)-“16x2”手性表面的高精度自旋分辨电子结构

• 批准号: EP/S000941/1
• 负责人: Elaine Seddon
• 金额: $ 0.18万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FS000941%2F1
• 关键词: Precision; Spin; Resolved; Electronic; Structures

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.

该提案用于旅费和生活费，以使Seddon教授（主要研究员）和一名研究生能够在Elettra同步加速器（意大利）的APE-LE光电发射站上开展实验工作（最近已为此授予束时）。在Elettra工作的旅行、住宿和生活费过去是由Calipso Transnational Access计划提供的，不幸的是现在已经不再提供了。在这个beamtime中，我们的目标是对Si（110）-“16 x2”表面进行精确的、高精度的电子自旋极化测量，我们的计算预测这些表面将由于表面的手性而呈现出小的极化。与Elettra以前的实验工作相比，拟议的实验方案已经提前，以确保产生明确的数据。结果表明，这两个对映体表面表现出自旋极化，“镜像”对方将是一个强大的结果，这将在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而无需磁性覆盖层等的可能性。正在进行的项目，探索手性和Rashba效应在半导体材料中的表现形式，特别关注自旋注入/检测。

项目成果

Spin- and angle-resolved photoemission studies of the electronic structure of Si(110)“ 16×2 ” surfaces

Si(110)—16—2—表面电子结构的自旋和角度分辨光发射研究

• DOI: 10.1103/physrevb.100.075302
• 发表时间: 2019
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Lewis, N. K.;Lassailly, Y.;Martinelli, L.;Vobornik, I.;Fujii, J.;Bigi, C.;Brunkow, E.;Clayburn, N. B.;Gay, T. J.;Flavell, W. R.
• 通讯作者: Flavell, W. R.