Many-body and correlation effects in semiconductors

D. S. Chemla and Jagdeep Shah ()
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D. S. Chemla: University of California at Berkeley, Lawrence Berkeley Laboratory
Jagdeep Shah: Bell Laboratories, Lucent Technologies

Nature, 2001, vol. 411, issue 6837, 549-557

Abstract: Abstract Solids consist of 1022–1023 particles per cubic centimetre, interacting through infinite-range Coulomb interactions. The linear response of a solid to a weak external perturbation is well described by the concept of non-interacting ‘quasiparticles’ first introduced by Landau. But interactions between quasiparticles can be substantial in dense systems. For example, studies over the past decade have shown that Coulomb correlations between quasiparticles dominate the nonlinear optical response of semiconductors, in marked contrast to the behaviour of atomic systems. These Coulomb correlations and other many-body interactions are important not only for semiconductors, but also for all condensed-matter systems.

Date: 2001
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DOI: 10.1038/35079000

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