Abstract
We present a theoretical study of the influence of interference effects connected with the tunneling through s and pz orbitals of the apex atom in STM tip on the formation of STM image. The results show that such an interference may modify significantly the tunneling current by changing the current contributions from the different orbitals in the tip–sample system. STM simulations have been performed for the Al(0 0 1) surface and different fcc-metal tips: they clearly indicate that the height and type of the STM corrugation depend considerably on this interference.
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