Dissimilarity between metallic-like transport in the dielectric spin density wave and field induced spin density wave states in (TMTSF)_2PF_6

摘要

We report similarities and differences of the transport features in the spin density wave (SDW) and in the field induced SDW (FISDW) phases of the quasi one-dimensional compound (TMTSF)_2PF_6. As temperature decreases below " 2 K, the resistance in both phases exhibits a maximum and a subsequent strong drop. , However, the characteristic temperature of the R(T) maximum and its scaling behavior in different magnetic fields B evidence that the non-monotonic R(T) dependences have different origin in SDW and FISDW regions of the phase diagram. We also found that the borderline T_0(B,P) which divides the FISDW region of the P-B-T-phase diagram into the hysteresis and non-hysteresis domains, terminates in the N = 1 sub-phase; the borderline has thus no extension to the SDW N = 0 phase.