Spin-density-wave transition of (TMTSF)$_2$PF$_6$ at high magnetic fields

N. Matsunaga; K. Yamashita; H. Kotani; K. Nomura; T. Sasaki; T. Hanajiri; J. Yamada; S. Nakatsuji; H. Anzai

doi:10.1103/PhysRevB.64.052405

paper

Spin-density-wave transition of (TMTSF) $_{2}$ PF $_{6}$ at high magnetic fields

arXiv:cond-mat/0105336 · doi:10.1103/PhysRevB.64.052405

Abstract

The transverse magnetoresistance of the Bechgaard salt (TMTSF) $_{2}$ PF $_{6}$ has been measured for various pressures, with the field up to 24 T parallel to the lowest conductivity direction c $^{*}$ . A quadratic behavior is observed in the magnetic field dependence of the spin-density-wave (SDW) transition temperature $T_{SDW}$ . With increasing pressure, $T_{SDW}$ decreases and the coefficient of the quadratic term increases. These results are consistent with the prediction of the mean-field theory based on the nesting of the quasi one-dimensional Fermi surface. Using a mean field theory, $T_{SDW}$ for the perfect nesting case is estimated as about 16 K. This means that even at ambient pressure where $T_{SDW}$ is 12 K, the SDW phase of (TMTSF) $_{2}$ PF $_{6}$ is substantially suppressed by the two-dimensionality of the system.

11pages,6figures(EPS), accepted for publication in PRB

Spin-density-wave transition of (TMTSF)2​PF6​ at high magnetic fields

Abstract

Spin-density-wave transition of (TMTSF) $_{2}$ PF $_{6}$ at high magnetic fields