Review of the P - T phase diagram of the organic superconductor (TMTSF)2ReO4

Abstract

We reviewed pressure-temperature phase diagram of the title compound by electrical resistivity measurement. We observed the clear evidence of the (0,1/2,1/2) anion ordering transition in resistivity by an abrupt decrease below the transition reminiscent to the one in (TMTSF)2ClO4. Successive anion ordering transitions are clearly confirmed in the intermediate pressure range. Overall characteristics of our phase diagram agree with that determined by X-ray scattering.