Optical Spectra and Electronic Band Structure Calculations of β‘ ‘-(ET)2SF5RSO3 (R = CH2CF2, CHFCF2, and CHF): Changing Electronic Properties by Chemical Tuning of the Counterion
We report the polarized infrared reflectance spectra, optical conductivity, and electronic band structure of metallic β‘ ‘-(ET)2SF5CHFSO3 and compare our results with those of the β‘ ‘-(ET)2SF5CH2CF2SO3 superconductor and the β‘ ‘-(ET)2SF5CHFCF2SO3 metal/insulator material. We discuss the electronic...
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Published in | Chemistry of materials Vol. 12; no. 8; pp. 2490 - 2495 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
21.08.2000
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Subjects | |
Online Access | Get full text |
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Summary: | We report the polarized infrared reflectance spectra, optical conductivity, and electronic band structure of metallic β‘ ‘-(ET)2SF5CHFSO3 and compare our results with those of the β‘ ‘-(ET)2SF5CH2CF2SO3 superconductor and the β‘ ‘-(ET)2SF5CHFCF2SO3 metal/insulator material. We discuss the electronic structure of these organic molecular solids in terms of band structure, many-body effects, and disorder. On the basis of spectral similarities between the superconductor and metallic salts and structural differences in the anion pocket of all three, we conclude that the unusual electronic excitations observed in the β‘ ‘-(ET)2SF5CHFCF2SO3 metal/insulator material are not caused by electron correlation but are due to disorder-related localization. |
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Bibliography: | ark:/67375/TPS-Q157MZQD-R istex:E588D28C39BFA4083CF9F0E10271A29B463D4604 |
ISSN: | 0897-4756 1520-5002 |
DOI: | 10.1021/cm000349l |