Impurity effect on surface states of Bi (111) ultrathin films

Zhu Kai^{1, 2}, Tian Dai^{1, 2}, Wu Lin^{1, 2}, Xu Jianli^{1, 2}, Jin Xiaofeng^{1, 2, †,}

Magnetoconductivity curves for the 5.0-nm Bi film with (blue) and without (red) Cu surface impurities. The black line shows the low magnetic field data fits reasonably good to Eq. (1).