Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/10672
Structural and electronic properties of the one-dimensional organic metal bis(thiodimethylene)-tetrathiafulvalene tetracyanoquinodimethane
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
The synthesis and structural characterization at room temperature and 130 K of the organic charge-transfer salt bis(thiodimethylene)-tetrathiafulvalene tetracyanoquinodimethane (BTDMTTF-TNCQ) is reported. X-ray diffuse scattering as well as ir and Raman measurements show that the charge transfer in this salt is ∼0.5. BTDMTTF-TCNQ remains metallic down to very low temperatures but exhibits an anomaly at 175 K in the conductivity and thermopower which could be related to some unusual structural modification of the unit cell. Band-structure calculations show that this salt is a narrow-band one-dimensional metal. The high value of the spin susceptibility, the low value of the conductivity, and the observation of a 4
k
F
charge-density-wave (CDW) instability around room temperature prove that it is a highly correlated metal. In contrast with other salts of the TTF-TCNQ family, BTDMTTF-TCNQ does not exhibit critical 2
k
F
structural fluctuations. It is proposed that the absence of the 2
k
F
CDW transition is due to the stronger interlocking of the donor and acceptor molecules due to the presence of the sulfur atoms in the central position of the outer five-membered rings of the BTDMTTF donor.
Matèries (anglès)
Citació
Citació
ROVIRA I ANGULO, Concepció, TARRÉS, J., LLORCA, Jordi, MOLINS I GRAU, Elies, VECIANA, Jaume, YANG, S., COWAN, D. o., GARRIGOU-LAGRANGE, C., AMIELL, J., DELHAES, Pierre, CANADELL, Enric, POUGET, Jean-paul. Structural and electronic properties of the one-dimensional organic metal bis(thiodimethylene)-tetrathiafulvalene tetracyanoquinodimethane. _Physical Review B_. 1995. Vol. 52, núm. 12, pàgs. 8747-8758. [consulta: 25 de febrer de 2026]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/10672]