Nonlinear mechanism of plasmon damping in electron gas

V. U. Nazarov, S. Nishigaki, T. Nagao

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

At plasmon resonance, the condition of applicability of the linear response theory, which is the smallness of the oscillating field, evidently breaks down. We suggest a variant of the quadratic response theory which remains valid near and at plasma frequency and demonstrate that, as could be anticipated, the nonlinearity serves itself to restrict the amplitude of plasma oscillations, thus providing a mechanism of "nonlinear damping." We apply this approach to calculate the damping of plasmon in two-dimensional electron gas below the threshold wave vector, which damping has recently been observed experimentally in the S1 surface band of Si(111)-÷3x÷3-Ag.

Original languageAmerican English
Article number092301
Pages (from-to)923011-923014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number9
DOIs
StatePublished - 1 Sep 2002
Externally publishedYes

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