Preparation of Superconducting Niobium Tips for Atomic-Resolution Scanning Tunneling Microscopy/Spectroscopy

被引：4

作者：

Shimizu, Ryota ^{[1
,2
]}

Hitosugi, Taro ^{[2
]}

Hashizume, Tomihiro ^{[2
,3
,4
]}

Fukuo, Noritaka ^{[5
]}

Hasegawa, Tetsuya ^{[1
]}

机构：

[1] Univ Tokyo, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan

[2] Tohoku Univ, Adv Inst Mat Res, World Premier Int Res Ctr Initiat, Sendai, Miyagi 9808577, Japan

[3] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan

[4] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[5] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 02期

关键词：

NB;

D O I：

10.1143/JJAP.49.028004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a new reliable method to prepare superconducting niobium (Nb) tips for scanning tunneling microscopy/spectroscopy (STM/STS). Sharp Nb tips were fabricated by chemical etching using an electrolyte based on a hydrofluoric acid and hydrogen peroxide solution, followed by field evaporation utilizing field ion microscopy to remove Nb oxide layers from the tip apex. STM/STS measurements of Si(111) and Au(111) surfaces confirmed that the tips had atomic resolution capability together with bulk-like superconducting properties, indicating that the prepared Nb tips can be used as a unique probe for investigating local superconducting and magnetic properties on an atomic scale. (C) 2010 The Japan Society of Applied Physics

引用

页数：2

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