Two-Orbital Kondo Screening in a Self-Assembled Metal-Organic Complex.
basic_science · Level V
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- Record sourced from PubMed, PMID 28234448.
- Also identified by DOI 10.1021/acsnano.6b07431.
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Abstract
Iron atoms adsorbed on a Cu(111) surface and buried under polyphenyl dicarbonitrile molecules exhibit strongly spatial anisotropic Kondo features with directionally dependent Kondo temperatures and line shapes, as evidenced by scanning tunneling spectroscopy. First-principles calculations find nearly full polarization for the half-filled Fe 3d<sub>xz</sub> and 3d<sub>yz</sub> orbitals, which therefore can give rise to Kondo screening with the experimentally observed directional dependence and distinct Kondo temperatures. X-ray absorption spectroscopy and X-ray magnetic circular dichroism measurements confirm that the spin in both channels is effectively Kondo-screened. At ideal Fe coverage, these two-orbital Kondo impurities are arranged in a self-assembled honeycomb superlattice.