In Situ Electronic Structure Study of Epitaxial Niobium Thin Films by Angle-Resolved Photoemission Spectroscopy

被引：5

作者：

Xiang, Pai ^{[1
]}

Liu, Ji-Shan ^{[1
,2
,3
]}

Li, Ming-Ying ^{[1
]}

Yang, Hai-Feng ^{[1
]}

Liu, Zheng-Tai ^{[1
]}

Fan, Cong-Cong ^{[1
]}

Shen, Da-Wei ^{[1
,2
,3
]}

Wang, Zhen ^{[1
,2
,3
]}

Liu, Zhi ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China

[2] CAS Ctr Excellence Superconducting Elect, Shanghai 200050, Peoples R China

[3] CAS Shanghai Sci Res Ctr, Shanghai 201203, Peoples R China

[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Div Photon Sci & Condensed Matter Phys, Shanghai 200031, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2017年 / 34卷 / 07期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

SURFACE-STATE; NB FILMS; SUPERCONDUCTIVITY; SAPPHIRE; GROWTH;

D O I：

10.1088/0256-307X/34/7/077402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-quality single crystalline niobium films are grown on a-plane sapphire in molecular beam epitaxy. The film is single crystalline with a (110) orientation, and both the rocking curve and the reflection high-energy electron diffraction pattern demonstrate its high-quality with an atomically smooth surface. By in situ study of its electronic structure, a rather weak electron-electron correlation effect is demonstrated experimentally in this 4d transition metal. Moreover, a kink structure is observed in the electronic structure, which may result from electron-phonon interaction and it might contribute to the superconductivity. Our results help to understand the properties of niobium deeply.

引用

页数：5

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