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Pseudogap Mediated by Quantum-Size Effects in Lead Islands

Authors Kedong Wang
Xieqiu Zhang
M. M. T. Loy
T.-C. Chiang
Xudong Xiao
Issue Date 2009
Source Physical review letters, v. 102, (7), February 2009
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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