High-resolution scanning tunneling spectroscopy of magnetic impurity induced bound states in the superconducting gap of Pb thin films |
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Authors: | Ji Shuai-Hua Zhang Tong Fu Ying-Shuang Chen Xi Ma Xu-Cun Li Jia Duan Wen-Hui Jia Jin-Feng Xue Qi-Kun |
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Affiliation: | Department of Physics, Tsinghua University, Beijing 100084, China. |
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Abstract: | Tunneling spectra for individual atoms and dimers of Mn and Cr adsorbed on superconducting Pb thin films were measured by a low temperature scanning tunneling microscope. Multiple-resonance structures within the superconducting gap on the adsorbates were resolved and interpreted as the magnetic impurity-induced bound states associated with different scattering channels. The experiment demonstrates a spectroscopic approach to characterizing the spin states of magnetic structures and exploring the competition between superconductivity and magnetism at the nanometer scale. |
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