The role of occupied d states in the relaxation of hot electrons in Au

Details The role of occupied d states in the relaxation of hot electrons in Au The role of occupied d states in the relaxation of hot electrons in Au

2000-05-03

arxiv.org/abs/cond-mat/0005071v1

Phys. Rev. B 62, 1500 (2000)

Physics

Condensed Matter

Materials Science

4 pages, 2 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.62.1500

We present first-principles calculations of electron-electron scattering rates of low-energy electrons in Au. Our full band-structure calculations indicate that a major contribution from occupied d states participating in the screening of electron-electron interactions yields lifetimes of electrons in Au with energies of $1.0-3.0 {\rm eV}$ above the Fermi level that are larger than those of electrons in a free-electron gas by a factor of $\sim 4.5$. This prediction is in agreement with a recent experimental study of ultrafast electron dynamics in Au(111) films (J. Cao {\it et al}, Phys. Rev. B {\bf 58}, 10948 (1998)), where electron transport has been shown to play a minor role in the measured lifetimes of hot electrons in this material.

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