Vibrational assignments in the conductivity spectra of semiconducting (TMTSF) sub 2 ReO sub 4 and (TMTSF) sub 2 BF sub 4 (where TMTSF is tetramethyltetraselenafulvalene) for radiation polarized perpendicular to the
- Department of Physics, University of British Columbia, Vancouver, British Columbia, Canada V6T 2A6 (CA)
We present a vibrational analysis of the transverse {bold E}{parallel}{bold b}{prime} conductivity of semiconducting (TMTSF){sub 2}ReO{sub 4} and (TMTSF){sub 2}BF{sub 4} (where TMTSF is tetramethyltetraselenafulvalene). We also report the results of a normal-coordinate calculation of the vibrations of the deuterated (TMTSF){sup +} molecule, which was used to assist in the reported assignments. The data were supplemented with powder spectra, which showed predominantly the infrared-active {ital b}{sub 1{ital u}} modes. The {bold E}{bold b}{prime} spectra displayed the expected infrared-active {ital b}{sub 2{ital u}} modes, as well as several totally symmetric {ital a}{sub {ital g}} modes resulting from the general site symmetry of the molecule. Unusual strength is noticed in the two {ital b}{sub 2{ital u}} modes which are almost degenerate with the very intense {nu}{sub 4}({ital a}{sub {ital g}}) doublet observed in the {bold E}{bold a} spectra. In that polarization the strength is derived from electron-phonon coupling. There is, however, no such coupling observed in the {bold E}{bold b}{prime} polarization.
- OSTI ID:
- 5686474
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:17; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603* -- Materials-- Properties
BORON COMPOUNDS
BORON FLUORIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DEUTERATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY
ENERGY LEVELS
EXCITED STATES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
LATTICE VIBRATIONS
MATERIALS
MEDIUM TEMPERATURE
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC SEMICONDUCTORS
ORGANIC SUPERCONDUCTORS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLARIZATION
POTENTIAL ENERGY
REFLECTIVITY
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
RHENIUM OXIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR MATERIALS
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
SURFACE PROPERTIES
TMTSF
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE
VIBRATIONAL STATES