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Title: Asymmetry effects in atomically resolved STM images of Cu (014)-O and W (100)-O surfaces measured with MnNi tips
Sponsor: Science Foundation Ireland
European Union (EU)
Author's Homepage:
Keywords: Atomic, molecular and chemical physics
Issue Date: 2007
Publisher: American Physical Society
Citation: Murphy, S.; Radican, K.; Shvets, I. V.; Chaika, A. N.; Semenov, V. N.; Nazin, S. S.; Bozhko, S. I., Asymmetry effects in atomically resolved STM images of Cu (014)-O and W (100)-O surfaces measured with MnNi tips, Physical Review B, 76, 24, 2007, 245423
Series/Report no.: Physical Review B;
Abstract: We report on scanning tunneling microscopy (STM) studies of the Cu(014)-O and W(100)-O surfaces using MnNi tips. The STM data demonstrate asymmetry effects in atomically resolved images of W(100)-O as well as a regular apparent doubling of surface atomic features along the {110} direction in Cu(014)-O surface images. A qualitative explanation of the observed features based on tight-binding (TB) and density functional theory (DFT) calculations of the electronic structure of the MnNi tip is presented. The experimentally observed tip-sample distance dependence of atomically resolved images of Cu(014)-O surface and results of DFT and TB calculations show a significant role of different electron orbitals on both the tip and the surface atoms in the STM image formation.
Description: PUBLISHED
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Appears in Collections:Physics (Scholarly Publications)

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