Optical spectra and electronic band structure calculations of {beta}'-(ET){sub 2}SF{sub 5}RSO{sub 3} (R=CH{sub 2}CF{sub 2}, CHFCF{sub 2} 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 {beta}{prime}-(ET){sub 2}SF{sub 5}CHFSO{sub 3} and compare our results with those of the {beta}{prime}-(ET){sub 2}SF{sub 5}CH{sub 2}CF{sub 2}SO{sub 3} superconductor and the {beta}{prime}-(ET){sub 2}SF{sub 5}CHFCF{sub 2}SO{sub 3} 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 {beta}{prime}-(ET){sub 2}SF{sub 5}CHFCF{sub 2}SO{sub 3} metal/insulator material are not caused by electron correlation but are due to disorder-related localization.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; NSF
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 942939
- Report Number(s):
- ANL/CHM/JA-36094
- Journal Information:
- Chem. Mater., Journal Name: Chem. Mater. Journal Issue: 8 ; Aug 2000 Vol. 12; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- ENGLISH
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