2013/08/19 by Omid Faizy Namarvar, Namarvar, Omid Faizy, Didier Mayou +1
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials #FOS: Physical sciences #Force Microscopy Techniques and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1308.4052
openalex publication_date 2013/08/19 · arxiv created 2014/01/06 · arxiv updated 2014/01/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We analyze the STM current through electronic resonances on a substrate as a function of tip-surface distance. We show that when the tip approaches the surface a Fano hybridization can occur between the electronic resonance on the substrate and the continuum of conduction states in the STM tip. A maximum of the density of states of the electronic resonance at some energy can then lead to a dip of the STM signal dI/dV. Resonances in graphene, known as mid gap states, are good candidates to produce this type of Fano interference. The mid gap states can be produced by local defects or adsorbates and we analyze the cases of top and hollow configurations of adsorbates.