Evidence for an Ultrafast Breakdown of the BeO Band Structure Due to Swift Argon and Xenon Ions
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Auger-electron spectra associated with Be atoms in the pure metal lattice and in the stoichiometric oxide have been investigated for different incident charged particles. For fast incident electrons, for Ar(7+) and Ar(15+) ions as well as Xe(15+) and Xe(31+) ions at velocities of 6% to 10% the speed of light, there are strong differences in the corresponding spectral distributions of Be-K Auger lines. These differences are related to changes in the local electronic band structure of BeO on a femtosecond time scale after the passage of highly charged heavy ions.
Извор:Physical Review Letters, 2010, 105, 18
- Alexander von Humboldt foundation, CNPq