Application of magnetic atom induced bound states in superconducting gap for chemical identification of single magnetic atoms

被引:22
作者
Ji, Shuai-Hua [1 ,2 ]
Zhang, Tong [1 ,2 ]
Fu, Ying-Shuang [1 ,2 ]
Chen, Xi [2 ]
Jia, Jin-Feng [2 ]
Xue, Qi-Kun [1 ,2 ]
Ma, Xu-Cun [1 ]
机构
[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
adsorption; chromium; lead; localised states; magnetic impurities; manganese; scanning tunnelling microscopy; scanning tunnelling spectroscopy; superconducting energy gap; type I superconductors; ELECTRON-TUNNELING OBSERVATION; IMPURITY BANDS; MICROSCOPY; ALLOYS; LEAD;
D O I
10.1063/1.3318404
中图分类号
O59 [应用物理学];
学科分类号
摘要
Elemental identification at single atom level has been achieved with a low temperature scanning tunneling microscope. Magnetic atoms (Mn or Cr) adsorbed on a superconducting Pb substrate induce a set of well-defined resonance states inside the superconductor gap in scanning tunneling spectroscopy. We show that these localized characteristic bound states could serve as fingerprint for chemical identification of the corresponding atoms, similar to atomic/molecular spectra widely used in optical spectrometry. The experiment demonstrates a technique for element-resolved spectroscopy with simultaneous atomic-level spatial resolution. The influence of magnetic impurity concentration on the bound states has also been investigated.
引用
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页数:3
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