Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL Surface Science Reports Pub Date : 2020-03-01 DOI:10.1016/j.surfrep.2020.100480
Eugen Speiser , Norbert Esser , Benedikt Halbig , Jean Geurts , Wolf Gero Schmidt , Simone Sanna
{"title":"Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures","authors":"Eugen Speiser ,&nbsp;Norbert Esser ,&nbsp;Benedikt Halbig ,&nbsp;Jean Geurts ,&nbsp;Wolf Gero Schmidt ,&nbsp;Simone Sanna","doi":"10.1016/j.surfrep.2020.100480","DOIUrl":null,"url":null,"abstract":"<div><p>Low-dimensional self-organized surface structures, induced by (sub)monolayer metal adsorbates on semiconductor surfaces may give rise not only to a variety of emergent electronic properties, but also to a multitude of specific localized vibronic features. The focus of this review is on the analysis of these novel surface vibration eigenmodes. The application of <em>in situ</em> surface Raman spectroscopy under UHV conditions on clean semiconductor surfaces and those with self-ordered adsorbates, in close conjunction with the calculations of Raman spectra, based on the first-principles determination of the structural, electronic and vibronic properties, allows a consistent determination of the vibration eigenfrequencies, symmetry properties, and elongation patterns of the systems of interest. The localized nature of the surface eigenmodes determines the surface sensitivity, independent of the large penetration depth of light. The surface contribution can be selectively enhanced by employing resonance conditions to surface electronic transitions. Moreover, surface and bulk contributions can be separated by taking difference spectra between various stages of surface preparation. The relevant surfaces are Ge and especially Si with different orientations ((111) and vicinal (hhk)), on which the adsorption of various metals (Au, Sn, Pb, or In) gives rise to two- and quasi-one-dimensional structures (e.g. Au-(5 × 2)/Si(111)) with a variety of vibration modes. The Raman analysis of these modes not only enables the distinction between different proposed structural models (e.g. for Au-(<span><math><msqrt><mrow><mn>3</mn></mrow></msqrt><mo>×</mo><msqrt><mrow><mn>3</mn></mrow></msqrt></math></span>)/Si(111)), but also gives access to the role of electron-phonon coupling in structural phase transitions (e.g. for In-(8 × 2)–(4 × 1)/Si(111)).</p></div>","PeriodicalId":434,"journal":{"name":"Surface Science Reports","volume":null,"pages":null},"PeriodicalIF":8.2000,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.surfrep.2020.100480","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface Science Reports","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167572920300017","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 3

Abstract

Low-dimensional self-organized surface structures, induced by (sub)monolayer metal adsorbates on semiconductor surfaces may give rise not only to a variety of emergent electronic properties, but also to a multitude of specific localized vibronic features. The focus of this review is on the analysis of these novel surface vibration eigenmodes. The application of in situ surface Raman spectroscopy under UHV conditions on clean semiconductor surfaces and those with self-ordered adsorbates, in close conjunction with the calculations of Raman spectra, based on the first-principles determination of the structural, electronic and vibronic properties, allows a consistent determination of the vibration eigenfrequencies, symmetry properties, and elongation patterns of the systems of interest. The localized nature of the surface eigenmodes determines the surface sensitivity, independent of the large penetration depth of light. The surface contribution can be selectively enhanced by employing resonance conditions to surface electronic transitions. Moreover, surface and bulk contributions can be separated by taking difference spectra between various stages of surface preparation. The relevant surfaces are Ge and especially Si with different orientations ((111) and vicinal (hhk)), on which the adsorption of various metals (Au, Sn, Pb, or In) gives rise to two- and quasi-one-dimensional structures (e.g. Au-(5 × 2)/Si(111)) with a variety of vibration modes. The Raman analysis of these modes not only enables the distinction between different proposed structural models (e.g. for Au-(3×3)/Si(111)), but also gives access to the role of electron-phonon coupling in structural phase transitions (e.g. for In-(8 × 2)–(4 × 1)/Si(111)).

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
吸附诱导低维表面结构的振动拉曼光谱
由半导体表面上的(亚)单层金属吸附引起的低维自组织表面结构不仅可以产生各种涌现的电子特性,还可以产生许多特定的局域振动特征。本文的重点是分析这些新的表面振动特征模态。在特高压条件下,将原位表面拉曼光谱应用于清洁半导体表面和自有序吸附剂表面,并结合拉曼光谱的计算,基于结构、电子和振动特性的第一性原理确定,可以一致地确定感兴趣系统的振动特征频率、对称特性和延伸模式。表面特征模的局域性决定了表面灵敏度,而不依赖于光的大穿透深度。通过对表面电子跃迁采用共振条件,可以选择性地增强表面贡献。此外,表面和体贡献可以通过在表面制备的不同阶段之间取不同的光谱来区分。相关的表面是不同取向的Ge,特别是Si((111)和相邻的(hhk)),在其上吸附各种金属(Au, Sn, Pb或In)产生二维和准一维结构(例如Au-(5 × 2)/Si(111)),具有多种振动模式。这些模式的拉曼分析不仅能够区分不同提出的结构模型(例如Au-(3×3)/Si(111)),而且还可以访问电子-声子耦合在结构相变中的作用(例如in -(8 × 2)-(4 × 1)/Si(111))。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
期刊最新文献
Editorial Board Hexagonal boron nitride on metal surfaces as a support and template X-ray photoelectron spectroscopy of epitaxial films and heterostructures Editorial Board Atomic wires on substrates: Physics between one and two dimensions
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1