Although the relative Fermi surfaces for all compounds are very similar, at low temperatures many of the compounds exhibit different properties.
Thick lines indicate first order transitions and thin lines indicate second order transitions.
DW is short for density wave. Recent work reveals that this ground state is composed of complex sub-phases including an orbital induced phase for field orientations along the ET plane. A schematic phase diagram is shown in Fig. 1. The general behavior can be modeled in the framework of a charge density wave. At this point, the true mechanism of the low temperature ground state is still in question.