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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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