Hall Effect and Conduction Anisotropy in the Organic Conductor(TMTSF)2PF6

Abstract

Both the Hall effect and the ${\mathrm{ab}}^{\prime }$-plane conduction anisotropy are directly addressing the unconventional normal phase properties of the Bechgaard salt $(\mathrm{TMTSF}{)}_2{\mathrm{PF}}_6$. We found that the dramatic reduction of the carrier density deduced from recent optical data is not reflected in an enhanced Hall resistance. The pressure and temperature dependence of the $b^{\prime }$-direction resistivity reveal isotropic relaxation time and do not require explanations beyond the Fermi liquid theory. Our results allow a coherent-diffusive transition in the interchain carrier propagation, however the possible crossover to Luttinger liquid behavior is placed at an energy scale above room temperature.