Pseudogap Mediated by Quantum-Size Effects in Lead Islands
Loy, M. M. T.
Chiang, T. -C.
|Source||Physical Review Letters , v. 102, (7), 2009, FEB 20, article number 076801|
|Summary||Scanning tunneling spectroscopy measurements of Pb islands on Si(111) at high energy resolution reveal a novel pseudogap, or a pseudopeak in special cases, around the Fermi level in addition to the usual quantum well states. These gap or peak features persist to temperatures as high as similar to 80 K and are uniquely related to the quantum well nanostructure of the Pb islands. A systematic analysis indicates that electron-phonon scattering is responsible for the observed electronic structure.|
|Rights||Physical Review Letters © Copyright 2009 American Physical Society. The Journal's web site is located at http://prl.aps.org|
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