Incoherent interplane conductivity of kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br - art. no. 094503

Citation
Jj. Mcguire et al., Incoherent interplane conductivity of kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br - art. no. 094503, PHYS REV B, 6409(9), 2001, pp. 4503
Citations number
47
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6409
Issue
9
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010901)6409:9<4503:IICOK->2.0.ZU;2-1
Abstract
The interplane optical spectrum of the organic superconductor kappa-(BEDT-T TF)(2)Cu[N(CN)(2)]Br was investigated in the frequency range from 40 to 40 000 cm(-1). The optical conductivity was obtained by Kramers-Kronig analysi s of the reflectance. The absence of a Drude peak at low frequency is consi stent with incoherent conductivity but in apparent contradiction to the met allic temperature dependence of the dc resistivity. We set an upper limit t o the interplane transfer integral of t(b)(2)/t(ac)approximate to 10(-7) eV . A model of defect-assisted interplane transport can account for this disc repancy. We also assign the phonon lines in the conductivity to the asymmet ric modes of the BEDT-TTF molecule.