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| Paper IPM / P / 6779 |
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| Abstract: | |||||
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This paper is an extension of an earlier work on electron
correlations in semiconducting GaAs-based quasi-one-dimensional
quantum wires. The extension was twofold. First, we developed the
Singwi, Tosi, Land, and S?lander (STLS) scheme for multisubband
structures. Secondly, we developed the multisubband ladder
approximation diagrammatic technique. By using the results
obtained for the spin symmetric and spin antisymmetric
interpolarization and intrapolarization potentials, we calculate
the corresponding electron-electron effective potentials. Our
results for a two-subband model show that these effective
potentials have an attractive part implying the occurrence of
s-wave and p-wave pairings, and thereby, suggesting the
observation of s-wave and p-wave intrinsic superconductivity. In
addition, by using the set of self-consistent multisubband STLS
equations for a two-subband model, we have calculated the spin
symmetric and spin antisymmetric interpair and intrapair
correlation functions, as well as the static structure factors.
Also the collective charge and spin density excitations are
computed and compared with experiments. The results are in
excellent agreement with experimental data.
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