Physical Review Letters · 1994 · 171 citations · 24 references
Natural SciencesPhysicsCondensed Matter PhysicsQuantum MechanicsSolid State PhysicsElectronic Band StructureQuantum TunnelingTwo-dimensional SemiconductorsCoulomb InteractionElectron TunnelingResonant TunnelingTemperature Dependence Of TunnelingTunneling CurrentTunneling PhenomenaTwo-dimensional Electron GasesTwo-dimensional Electron Systems
We have observed a Fermi-edge singularity in the tunneling current between a two-dimensional electron gas (2DEG) and a zero-dimensional localized state. A sharp peak in the tunnel current is observed when the energy of the localized state matches the Fermi energy of the 2DEG. The peak grows and becomes sharper as the temperature is decreased to our lowest temperature of 70 mK. We attribute the singularity to the Coulomb interaction between the tunneling electron on the localized site and the Fermi sea.
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On-Site Coulomb Repulsion and Resonant Tunneling
Tai Kai Ng, Patrick A. Lee · Physical Review Letters · 1988 · 999 citations
Single-electron capacitance spectroscopy of discrete quantum levels
R. C. Ashoori, H. L. Störmer, J. S. Weiner et al. · Physical Review Letters · 1992 · 485 citations