Magnetic surface states on Ni(100)

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Abstract
Angle-resolved photoelectron spectra, utilizing polarized synchrotron radiation, from Ni(100) reveal a narrow surface-sensitive peak at the Fermi energy. This structure exists near the surface-Brillouin-zone edges in both the [10] and [11] directions. The symmetry of this state is odd (even) with respect to the (100) [(110)] mirror plane. Projections of the bulk bands onto the surface Brillouin zone show that these surface-sensitive energy levels exist in regions of the surface Brillouin zone where there are gaps in only one spin band. The very narrow energy width of these states indicates that they are surface states and consequently magnetic.

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