TY - JOUR
T1 - Nonlinear mechanism of plasmon damping in electron gas
AU - Nazarov, V. U.
AU - Nishigaki, S.
AU - Nagao, T.
PY - 2002/9/1
Y1 - 2002/9/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0036751842&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.66.092301
DO - 10.1103/PhysRevB.66.092301
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AN - SCOPUS:0036751842
SN - 0163-1829
VL - 66
SP - 923011
EP - 923014
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 092301
ER -