Magnetic state above the surface (IMAGE)
Caption
The figure (left) shows the magnetic state above the surface by means of its (simplified) wave function (green wavy line), which penetrates beneath the graphene (dark grey small spheres) to the magnetic iron (blue spheres). Electrons (small yellow spheres) ‘tunnel’ from the magnetic scanning probe tip into this state. The green arrows indicate the electron spin, a quantum mechanical property of electrons related to the magnetic properties.
Right from the image of the sample surface, two microscope images can be seen. The upper image shows a contrast between sample positions with different stacking sequences, while the lower image shows a map of the local spin polarisation, which is due to the spin density at the buried interface.
Credit
ACS – Schlenhoff Group
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