High-resolution scanning tunneling spectroscopy of magnetic impurity induced bound states in the superconducting gap of Pb thin films.
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.
Ji
Shuai-Hua
SH
Department of Physics, Tsinghua University, Beijing 100084, China.
Zhang
Tong
T
Fu
Ying-Shuang
YS
Chen
Xi
X
Ma
Xu-Cun
XC
Li
Jia
J
Duan
Wen-Hui
WH
Jia
Jin-Feng
JF
Xue
Qi-Kun
QK