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低速電子線回折と角度分解光電子分光による表面吸着構造の解析

使用慢电子衍射和角分辨光电子能谱分析表面吸附结构

基本信息

批准号：
62609520
负责人：
金持徹
金额：
$ 2.11万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
1987
资助国家：
日本
起止时间：
1987 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62609520/
关键词：
低速電子線回折角度分解光電子分光表面構造表面電子状態

项目摘要

低速電子線回折(LEED)によるI-V曲線の動力学的解析と角度分解光電子分光(ARUPS)によるスペクトル曲線の角度依存性から, 単結晶表面の原子的構造並びにその上に吸着させた金属原子層の吸着構造と電子状態の解明を行っている. 今年度の科学研究費により副チャンバーと試料交換装置を製作し, 種々の金属を蒸着できるようになっただけでなく, 超高真空実験装置に試料を挿入設置する際の所用時間を大幅に短縮した.S_2(111)面上でのFe蒸着膜についてLEEDI-V曲線の測定及び動力学的回折強度計算による解析により, 室温でエピタキシャル成長して(1×1)LEEDパターンを示すFe蒸着膜の単原子層の段階では, Fe原子は表面第1層のSi原子の真上に付着している可能性の高い事がわかった. またこの膜を高温でアニールするとより安定な位置に移動して(2×2)パターンに変化するが, ARUPSの測定より, 電子状態が高結合エネルギー側へシフトする事, 及び結合にあずかる電子状態に対応するピーク強度のフォトン入射角, 放出される電子の出射角(極角及び方位角)依存性に興味ある現象が観測され, 吸着構造との関連で現在解析を進めている.一方, MgO(001)面上のFe蒸着膜についても解析を進めた結果, 最初Fe原子は表面第1層のOイオンの上に付着して基板と同じ周期の構造を形成する事, 膜厚が10〓位になると体心正方格子(bct)から体心立方格子(bcc)構造に変化し始める事, この時点でFe原子の価電子帯の電子状態にも変化の起る事がわかった.今後, 装置をさらに改良し, MgO(001)面上のFe蒸着膜のARUPS測定を行って電子状態の変化を確かめると共に, 基板結晶や蒸着金属の種類を変えて研究を進め, 固体表面に形成される単原子層程度の膜の原子的構造を決定する要因を明らかにして行きたい.

Analytical analysis of the dynamics of low-speed power line foldback (LEED) photoelectron spectroscopy (ARUPS), photoelectron spectroscopy (ARUPS), photoelectron spectroscopy (PBS), optical fiber (UV), optical fiber, optical fiber, electron, optical, optical In the course of this year's scientific research program, the equipment for the exchange of materials has been put into operation, and all kinds of metals are steaming. The temperature of the ultra-high vacuum storage device is much shorter than that used in the setting temperature. The determination of the curve and the calculation of the return strength of the dynamic strength of the evaporated Fe film on the surface of Song2 (111A) are determined by the determination of the curve of the LEEDI-V curve and the calculation of the strength of the kinetic mechanics. the temperature at room temperature is the temperature at room temperature. the growth temperature (1 × 1) LEED shows that the film is evaporated by Fe and the atomic section of the film is cured. Fe atom "surface first"Si atom" really pays for the possibility of high probability and high probability. The film is operated at high temperature, the temperature is stable, the position is moved, the temperature is changed, the temperature is measured by ARUPS, the temperature is high, and the incident angle is measured by combining the high temperature with the temperature, and the incident angle is determined by the combination of the strength and the incident angle. The emission angle (angle and azimuth) is dependent on the emission angle (angle and azimuth). The emission angle (angle and azimuth) is dependent on the emission angle (angle and azimuth). On the one hand, the results of the analysis of the Fe film on the MgO (001) surface show that the substrate is the same as the cycle on the surface of the Fe atom, and the thickness of the film is 10%. The thickness of the film is 10%, and the thickness of the film is 10%. The thickness of the film is similar to that of the body-centered square lattice (bct) and the body-centered cubic lattice (bcc). At some point in time, Fe atoms and electrons will change the state of the electricity and cause accidents. In the future, the device has been improved, and the Fe film on the MgO (001) surface has been evaporated. The ARUPS test results show that the electronic state measurement is very common, the substrate is steamed with metal, and the formation of thin film atoms on the solid surface is determined by the formation of thin film atoms.