Field-induced SDW phase diagram of (TMTSF)2PF6 at high magnetic fields

Abstract

Abstract Magnetoresistance measurements have been carried out along the highly conducting a-axis in the field-induced SDW (FISDW) phase of (TMTSF)2PF6 under 1.0 GPa , with the field up to 27 T parallel to the lowest-conductivity direction c ∗ . We have determined the phase boundary between the last semimetallic FISDW phase with n=1 and the FISDW insulating phase with n=0 and found that the semimetallic FISDW phase existed above the transition temperature of the FISDW insulating phase at least up to 24 T . These results suggest the necessity of the theoretical calculation for more realistic quasi-one-dimensional Fermi surface to explain the FISDW phase of (TMTSF)2PF6.