Abstract

Pulsed-laser induced transient thermoelectric effect and dc magnetotransport have been measured for molecular conductors (DMe-DCNQI) 2Cu( h salt) and its deuterated crystals ( d 7 salt) over the temperature range 4.2–300 K. These dynamic and static data are reasonably explained by a two-carrier model of the three-dimensional hole bands located around the Λ and P points in the Brillouin zone at low temperatures, together with a contribution from the one-dimensional electron band at high temperatures (dimensional crossover at around 150 K). Discussions are given for the effect of deuteration on the band structure and metal-insulator transition.

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