• DOI:10.1103/PhysRevLett.80.1046
• Corpus ID: 118946132

ELECTRON-HOLE COHERENCE AND CHARGING EFFECTS IN ULTRASMALL METALLIC GRAINS

@article{Drewes1998ELECTRONHOLECA,
  title={ELECTRON-HOLE COHERENCE AND CHARGING EFFECTS IN ULTRASMALL METALLIC GRAINS},
  author={S. Drewes and Scot R. Renn and Francisco Guinea},
  journal={Physical Review Letters},
  year={1998},
  volume={80},
  pages={1046-1049}
}

• S. Drewes, S. Renn, F. Guinea
• Published 1 July 1997
• Physics
• Physical Review Letters

We consider a model for electron tunneling between a pair of ultrasmall metallic grains. Under appropriate circumstances, non-equilibrium final state effects can strongly enhance tunneling and produce electron-hole coherence between the grains. The model displays a quantum phase transition between a Coulomb blockaded state to a coherent state exhibiting subohmic tunneling conductance. The critical state of the junction exhibits a temperature independent resistance of order $h/e^2$. Finally we discuss the possible relevance to granular materials and quantum dots. In particular, similarities between the quantum transition in our model and the metal-insulator transition in granular wires observed by Herzog et al. are described in detail.