Morphology and Chemistry of Lateral Composition Modulation

横向成分调制的形态学和化学

• 批准号: 9973352
• 负责人: Joanna Millunchick
• 金额: $ 29.53万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9973352&HistoricalAwards=false
• 关键词: Morphology; Chemistry; Lateral; Composition; Modulation

This project is directed toward achieving greater understanding of the mechanism(s) of spontaneous lateral composition modulation during epitaxy of compound semiconductors. The approach is to examine interactions between the morphology and chemistry of structures exhibiting lateral composition modulation grown by Molecular Beam Epitaxy and studied with in situ Scanning Tunneling Microscopy. Details of adatom interactions with surface features, adatom incorporation into the lattice, and morphological evolution will be studied. It is anticipated that these studies will provide the basis for greater understanding, and the development of new models of strained-layer alloy growth including morphological and chemical evolution, and assist in the application of these structures to novel low dimensional devices. %%%The project addresses basic research issues in a topical area of materials science having high potential technological relevance. The research will contribute basic materials science knowledge at a fundamental level to new aspects of electronic/photonic devices. The basic knowledge and understanding gained from the research is expected to contribute to improving the perform-ance of advanced devices and circuits by providing a fundamental understanding and a basis for designing and producing improved materials, and materials combinations. An important feature of the program is the integration of research and education through the training of students in a fundamentally and technologically significant area. ***

本计画旨在进一步了解化合物半导体磊晶过程中自发横向成分调变的机制。该方法是检查的形态和化学结构表现出横向成分调制生长的分子束外延和原位扫描隧道显微镜研究之间的相互作用。吸附原子与表面特征的相互作用，吸附原子纳入晶格，形态演变的细节将进行研究。预计这些研究将提供更好的理解的基础，应变层合金生长的新模型，包括形态和化学演变的发展，并协助这些结构的应用，以新颖的低维器件。该项目解决了材料科学领域的基础研究问题，具有很高的潜在技术相关性。 该研究将为电子/光子器件的新方面提供基础材料科学知识。 从研究中获得的基本知识和理解，预计将有助于提高先进器件和电路的性能，通过提供一个基本的理解和基础，设计和生产改进的材料，材料组合。该计划的一个重要特点是通过在一个基本和技术上重要的领域对学生进行培训来整合研究和教育。 ***