Many-body Effects in Mesoscopic Double Junctions

  • Masahito Ueda
  • Francisco Guinea
Conference paper


We predict novel many-body effects in mesoscopic double junctions which consist of a scanning-tunneling-microscope (STM) tip, a metallic micro-cluster, and a substrate. A tunneling event from the tip to the micro-cluster is shown to cause an infrared-divergent creation of electron-hole pairs in the substrate, thus making current and voltage steps outside the Coulomb gap unequal. It is also predicted that higher-order tunneling leads to a leakage current inside the Coulomb gap where tunneling is inhibited within the framework of the orthodox Coulomb blockade theory.


Tunneling Event Coulomb Blockade Conductance Anomaly NATO Advance Institute Study Double Junction 


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Copyright information

© Springer Japan 1992

Authors and Affiliations

  • Masahito Ueda
    • 1
  • Francisco Guinea
    • 2
  1. 1.NTT Basic Research LaboratoriesTokyo, 180Japan
  2. 2.Instituto de Ciencia de Materiales (sede B)Consejo Superior de Investigaciones CientíficasMadridSpain

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