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Pseudogap Mediated by Quantum-Size Effects in Lead Islands

Authors Wang, Kedong
Zhang, Xieqiu
Loy, Michael M.T.
Chiang, Taichang
Xiao, Xudong
Issue Date 2009
Source Physical Review Letters , v. 102, (7), 2009, Feb, 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.
ISSN 0031-9007
Rights © 2009 The American Physical Society
Language English
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