Observation of spin-dependent tunnel conductance by spin-polarized scanning tunneling microscopy using Ni tips

We present the observed results of spin-dependent tunnel conductance by SP-STM using the Ni tip and the Ni thin film samples. The tunnel conductance spectra generally depended on the magnetization direction of the Ni samples. It suggests the possibility of local tunnel injection and detection of the spin-polarized electrons between the magnetic tip and the single quantum dot.