On the Novel Properties of Ir Modified Si(001) and Si(111) Surfaces: Nanowires and Rashba Type Spin-Orbit Splitting

技术描述：本研究项目使用表面科学工具，如扫描隧道显微镜和光谱、低能电子衍射和俄歇电子能谱，研究了(001)和(111)取向的Ir改性硅表面。该项目包括两个主要的研究部分。第一组分主要是在Si(001)表面形成的硅化Ir纳米线。研究了这些纳米线的物理和电学性质。第二部分研究了在Ir/Si(111)表面观察到的Root-7相的电学性质。这项研究是由北达科他大学与国内和国际的其他科学家合作进行的。非技术描述：由于这些界面的技术相关性和这些界面展示的新颖物理，研究各种半导体表面上薄膜生长的初始阶段非常重要。本课题研究的重点是Ir-Si界面，目前还没有得到广泛的研究。除了在项目过程中获得的基本理解外，研究生和本科生还接受研究艺术方面的培训。参与这个项目的学生学习与技术相关的主题，如纳米电子学、低维物理和半导体。此外，该项目还包括旨在吸引当地/部落高中生参加的外联活动。

Technical Description: This research project investigates iridium modified silicon surfaces at (001) and (111) orientations using surface science tools such as scanning tunneling microscopy and spectroscopy, low energy electron diffraction, and Auger electron spectroscopy. The project contains two major research components. The first component focuses on iridium silicide nanowires formed on Si(001) surface. The physical and electronic properties of these nanowires are investigated. The second research component is on the electronic properties of the root-7 by root-7 phase observed on Ir/Si(111) surface. The research is carried out at the University of North Dakota, in collaboration with other scientists nationally and internationally.Non-technical Description: Investigation of the initial stages of thin-film growth on various semiconductor surfaces is important because of the technological relevance of these interfaces and the novel physics that these interfaces exhibit. This research project focuses on iridium-silicon interface, which has not been investigated extensively. In addition to the fundamental understanding gained during the course of the project, graduate and undergraduate students are trained in the art of research. The students involved in this project learn technologically relevant topics such as nanoelectronics, low-dimensional physics, and semiconductors. In addition, the project includes outreach activities that are designed to attract participants from local/tribal high-school students.