Transport studies of several novel organic conductors. [(BEDT-TTF)/sub 2/X; (TMTSF)/sub 2/SiF/sub 5/]

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6246403

Kwak, J F; Azevedo, L J; Schirber, J E; Williams, J M; Beno, M A

We present the results of conductivity and thermopower measurements on several new conducting organic compounds. (BEDT-TTF)/sub 2/BrO/sub 4/ is isomorphous with the superconducting ReO/sub 4/ salt; our data show it to be metallic above 200/sup 0/K and semiconducting below 100/sup 0/K, although without any clear transition. In (TMTSF)/sub 2/SiF/sub 5/ the anion is neither octahedral nor tetrahedral; however, our results suggest behavior very like the octahedral salts. (BEDT-TTF)/sub 2/InBr/sub 4/ is semiconducting at room temperature with an activation energy of .12 eV. Low-temperature conductivity measurements on (BEDT-TTF)/sub 2/I/sub 3/ at 0.5 kbar show suppression of the known ambient-pressure superconducting state to below 1/sup 0/K, and an anomaly at 7/sup 0/K reminiscent of the CDW transition in NbSe/sub 3/.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Argonne National Lab., IL (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6246403
• Report Number(s): SAND-84-0959C; CONF-841210-7; ON: DE85003950
• Country of Publication: United States
• Language: English

Related Subjects

656102* -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BROMIDES
BROMINE COMPOUNDS
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HETEROCYCLIC COMPOUNDS
INDIUM BROMIDES
INDIUM COMPOUNDS
IODINE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PERBROMATES
PHYSICAL PROPERTIES
SELENIUM COMPOUNDS
SILICON COMPOUNDS
SILICON FLUORIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMOELECTRIC PROPERTIES
TMTSF
TTF