Spin Density Wave Transition in (TMTSF)2PF6under Uniaxial Strain

The effect of uniaxial strain to spin-density-wave (SDW) transition in the organic conductor (TMTSF) 2 PF 6 was studied. Strain was applied along the a -, b '- and c * -axes separately. It was found that the SDW transition was most strongly suppressed by the strain along the one-dimensional (1-D) a -axis, and most weakly along the c * -axis, whereas our first expectation was that the most effective strain to the SDW suppression was along the b '-axis, since the interaction along b or b ' is directly associated with the denesting of the quasi-one-dimensional Fermi surface. We discuss why the strain along the axes other than the b '-axis suppress the 1-D nature and therefore SDW.