Correlation between OH density and Fe electronic states of H/Fe3O4(001) film surfaces studied by scanning tunneling microscopy/spectroscopy

被引：3

作者：

Hiura, Satoshi ^{[1
]}

Ikeuchi, Akira ^{[1
]}

Shirini, Soraya ^{[1
]}

Subagyo, Agus ^{[1
]}

Sueoka, Kazuhisa ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Informat Sci & Technol, Sapporo, Hokkaido 0600814, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2015年 / 54卷 / 08期

关键词：

HYDROGEN ADSORPTION; 1ST PRINCIPLES; FE3O4(001); MAGNETITE; WATER; RECONSTRUCTION; SPECTROSCOPY; MICROSCOPY; FE3O4(100); INSIGHTS;

D O I：

10.7567/JJAP.54.08LB02

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report two types of adsorption structures in H/Fe3O4(001) film surfaces and the correlation between OH density and Fe electronic states, which have been studied by scanning tunneling microscopy/spectroscopy (STM/STS). Two types of bright protrusions (BPs), whose lengths along the atomic rows are different, are observed in the STM images. The shorter and longer BPs consist of Fe atoms with one and with two OH groups neighbor, respectively. In addition, STS measurements show the higher local density of states (LDOS) just below the Fermi level of Fe atoms with increasing neighboring OH groups. The variation can be attributed to the difference in the gain of electrons from H atoms, which is due to the difference in the number of neighboring OH groups. These results reveal that surface OH density is a factor for determining the LDOS just below the Fermi level of surface Fe atoms. (C) 2015 The Japan Society of Applied Physics

引用

页数：4

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