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Título: | Sodium: A charge-transfer insulator at high pressures |
Autor: | Gatti, Matteo; Tokatly, I. V. CSIC ORCID; Rubio, Angel CSIC ORCID | Fecha de publicación: | 2010 | Editor: | American Physical Society | Citación: | Physical Review Letters 104(21): 216404 (2010) | Resumen: | By first-principles methods we analyze the optical response of transparent dense sodium as a function of applied pressure. We discover an unusual kind of charge-transfer exciton that proceeds from the interstitial distribution of valence electrons. The absorption spectrum is strongly anisotropic, which, just at pressures above the metal-insulator transition, manifests as sodium being optically transparent in one direction but reflective in the other. This result provides key information about the crystal structure of transparent sodium, a new unconventional inorganic electride. | Descripción: | 4 páginas, 3 figuras.-- PACS numbers: 71.35.Cc, 61.50.Ks, 71.20.Dg, 78.40.-q | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.104.216404 | URI: | http://hdl.handle.net/10261/44224 | DOI: | 10.1103/PhysRevLett.104.216404 | ISSN: | 0031-9007 | E-ISSN: | 1079-7114 |
Aparece en las colecciones: | (CFM) Artículos |
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Sodium: A charge.pdf | 363,05 kB | Adobe PDF | Visualizar/Abrir |
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