Interplay between structural, magnetic properties and calculated band structures of (EDT-TTF)2[M(dmit)2]2 where M = Ni, Pd

The resistivity hump which characterizes the 50 K metal-metal transition in (EDT-TTF)2[Pd(dmit)2]2 is shown to be associated with the condensation of a charge density wave ground state, as deduced from SQUID susceptibility and X-ray diffuse scattering measurements. Comparison between the observed CDW wavevector and the nesting properties of the calculated Fermi surfaces as a function of the electron transfer suggests that the charge transfer is approximately +34.