Abstract
As evidenced by the many contributions to these proceedings, the role of electron-electron interactions in solid-state systems continues to be the subject of intense investigation and debate. Much of the recent discussion has been stimulated by experimental work on exciting novel materials, including high-temperature superconducting copper oxides, “heavy-fermion” systems, organic synthetic metals, and halogen-bridged transition-metal chains. Unlike conventional metals, for which standard single-electron (band) theories describe quantitatively the electronic structures and excitations, these new materials are currently thought to have properties dominated by many-body effects arising from strong electron-electron interactions. It is essential to have tractable models that capture the essence of both electron-phonon (e-p) and electron-electron (e-e) interactions and that represent faithfully their synergetic, or competing, effects.
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References
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Campbell, D.K., Gammel, J.T., Loh, E.Y. (1989). Off-Diagonal Coulomb Interactions in the Extended Peierls-Hubbard Model: Exact Diagonalization Results. In: Baeriswyl, D., Campbell, D.K. (eds) Interacting Electrons in Reduced Dimensions. NATO ASI Series, vol 213. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0565-1_20
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DOI: https://doi.org/10.1007/978-1-4613-0565-1_20
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