8th international conference on electronic spectroscopy and structure Page: 3 of 9
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superconductors. David Muller (Lucent Technologies Bell Laboratories) continued with a
presentation on "Atomic-resolution electron energy loss spectroscopy in the scanning
transmission electron microscope: understanding the limits to scaling nano-transistors."
Muller demonstrated that there is an electronic transition region from silicon to silicon
dioxide in the gate region of an MOS transistor even when the structural transition is
atomically abrupt, which leads to a fundamental limit of about 0.7 nm on how thin the
gate oxide can be.
Berkeley Lab Director Charles Shank opened the Wednesday proceedings with his own
welcome, noting the vitality of a field that has endured for 30 years and pointing out the
growing importance of ultrafast time-resolved experiments in the femtosecond regime. In
the following plenary lecture "Intermolecular Coulombic decay in clusters and weakly
bound systems," Lorenz Cederbaum (Universitat Heidelberg) discussed a model for the
rapid decay that occurs by electron emission in inner-valence ionized molecular clusters,
but not in monomers of species such as water. In the model, an efficient Coulombic
mechanism transfers energy to neighboring monomers, thereby allowing electrons to
escape. Ernst Bauer (Arizona State University) then spoke on "Spectromicroscopy:
present and future." Bauer focused on the x-ray photoemission electron microscope
(XPEEM), calling attention to both sychrotron-radiation excited measurements and the
versatility possible with the addition of an electron source in the same instrument for
LEEM and LEED measurements and, in separate projects at BESSY II and the ALS, the
development of aberration-corrected electron optics for higher spatial resolution in the
Plenaries on Thursday began with Yves Baer (University of Neuchatel) speaking on
"High-resolution UV-photoemission of solids: success, limitations, and the future." Baer
reviewed three examples: Kondo systems involving cerium, where it is important to
distinguish bulk from surface effects, the strong electron-phonon interaction affecting the
beryllium (0001) surface state, and the breakdown of the quasi-particle concept in a one-
dimensional metal formed by linear chains of gold on a vicinal surface of silicon (111).
Joseph Nordgren (Uppsala University) continued with a presentation on "X-ray emission
Advanced Light Source
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Robinson, Art. 8th international conference on electronic spectroscopy and structure, article, October 16, 2000; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc788294/m1/3/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.