Two-Electron Photon Emission From Metallic Quantum Wells

Details Two-Electron Photon Emission From Metallic Quantum Wells Two-Electron Photon Emission From Metallic Quantum Wells

2002-07-31

arxiv.org/abs/cond-mat/0207746v2

Phys. Rev. Lett. 90, 046803 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

revised version, as published; 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.90.046803

Unusual emission of visible light is observed in scanning tunneling microscopy of the quantum well system Na on Cu(111). Photons are emitted at energies exceeding the energy of the tunneling electrons. Model calculations of two-electron processes which lead to quantum well transitions reproduce the experimental fluorescence spectra, the quantum yield, and the power-law variation of the intensity with the excitation current.

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