Abstract
Spin dependent electronic properties of c(2×2) Cr(001) thin film surfaces grown on MgO(001) substrates are investigated by means of spin-polarized scanning tunneling microscopy and spectroscopy. An averaged dI∕dV spectrum obtained on the c(2×2) Cr(001) thin film surfaces exhibits a surface state around +0.1eV above the Fermi level. The intensity of the surface state peak in the spectra measured on (001) terraces is alternately varied whenever a monatomic step is crossed. Therefore, the shifted surface state as well as an original one on (1×1) Cr(001) surfaces has spin-polarized feature.
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