Dynamical correlations in the one-dimensional electron gas with short-range interactions |
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Authors: | E Demirel B Tanatar |
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Institution: | (1) Department of Physics, Bilkent University, Bilkent, 06533 Ankara, Turkey, TR |
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Abstract: | We study the dynamical correlation effects in a one-dimensional Fermion gas with repulsive delta-function interaction within
the quantum version of the self-consistent field approximation of Singwi, Tosi, Land, and Sj?lander Phys. Rev. 176, 589 (1968)]. The dynamic correlation effects are described by a frequency dependent local-field correction . There is a corresponding local-field factor for the spin-density correlations. We investigate the structure factors, spin-dependent pair-correlation functions, the frequency
dependences of and , and the plasmon dispersion relation within this formalism. We compare our results with other theoretical approaches, in
particular the static version of the self-consistent field approximation to highlight the importance of dynamical correlations.
Received 11 December 1998 and Received in final form 25 April 1999 |
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Keywords: | PACS 71 10 Ca Electron gas Fermi gas[:AND:]71 45 Gm Exchange correlation dielectric and magnetic functions plasmons[:AND:]73 20 Dx Electron states in low-dimensional structures (superlattices quantum well structures and multilayers) |
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