Quantum-Well States as Fabry-Pérot Modes in a Thin-Film Electron Interferometer

Angle-resolved photoemission from atomically uniform silver films on iron (100) shows quantum-well states for absolutely determined film thicknesses ranging from 1 to ∼100 monolayers. These states can be understood in terms of Fabry-Pérot modes in an electron interferometer. A quantitative line shap...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1999-03, Vol.283 (5408), p.1709-1711
Main Authors: Paggel, J. J., Miller, T., T.-C. Chiang
Format: Article
Language:English
Subjects:
Binding energy
Capture
Conceptual Tempo
Electron capture
Electron, ion spectrometers and related techniques
Electrons
Exact sciences and technology
Film thickness
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Interferometers
Iron
Material films
Numbers
Phase shift
Photoelectric emission
Physics
Quantum Mechanics
Quantum theory
Quantum wells
Quasiparticles
Reflectance
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Summary:Angle-resolved photoemission from atomically uniform silver films on iron (100) shows quantum-well states for absolutely determined film thicknesses ranging from 1 to ∼100 monolayers. These states can be understood in terms of Fabry-Pérot modes in an electron interferometer. A quantitative line shape analysis over the entire two orders of magnitude of thickness range yields an accurate measurement of the band structure, quasiparticle lifetime, electron reflectivity, and phase shift. Effects of confinement energy gap, reflection loss, and surface scattering caused by controlled roughness are demonstrated.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.283.5408.1709