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Título: | Excitonic effects in solids described by time-dependent density-functional theory |
Autor: | Reining, Lucia; Olevano, Valerio; Rubio, Angel CSIC ORCID; Onida, Giovanni | Fecha de publicación: | 2002 | Editor: | American Physical Society | Citación: | Physical Review Letters 88(6): 066404 (2002) | Resumen: | Starting from the many-body Bethe-Salpeter equation we derive an exchange-correlation kernel fxc that reproduces excitonic effects in bulk materials within time-dependent density functional theory. The resulting fxc accounts for both self-energy corrections and the electron-hole interaction. It is static, nonlocal, and has a long-range Coulomb tail. Taking the example of bulk silicon, we show that the -α/q2 divergency is crucial and can, in the case of continuum excitons, even be sufficient for reproducing the excitonic effects and yielding excellent agreement between the calculated and the experimental absorption spectrum. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.88.066404 | URI: | http://hdl.handle.net/10261/98477 | DOI: | 10.1103/PhysRevLett.88.066404 | ISSN: | 0031-9007 | E-ISSN: | 1079-7114 |
Aparece en las colecciones: | (CFM) Artículos |
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Excitonic Effects in Solids.pdf | 121,22 kB | Adobe PDF | Visualizar/Abrir |
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