Dynamical response of a one dimensional quantum wire electron system

Details Dynamical response of a one dimensional quantum wire electron system Dynamical response of a one dimensional quantum wire electron system

1996-02-29

arxiv.org/abs/cond-mat/9602157v1

Phys. Rev. B 54, 1936 (1996)

Physics

Condensed Matter

23 pages, Revtex, 23 figures enclosed

Scientific paper

10.1103/PhysRevB.54.1936

We provide a self-contained theoretical analysis of the dynamical response of a one dimensional electron system, as confined in a semiconductor quantum wire, within the random phase approximation. We carry out a detailed comparison with the corresponding two and three dimensional situations, and discuss the peculiarities arising in the one dimensional linear response from the non-existence of low energy single-particle excitations and from the linear nature of the long wavelength plasmon mode. We provide a critical discussion of the analytic properties of the complex dielectric function in the complex frequency plane. We investigate the zeros of the complex dielectric function, and calculate the plasmon dispersion, damping, and plasmon spectral weight in one dimension. We consider finite temperature and impurity scattering effects on one dimensional plasmon dispersion and damping.

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