An Organic Spin‐Ladder Molecular Material

Pairs of stacks of organic donors D in the salt [(DT-TTF)2][Au(mnt)2] (DT-TTF = dithiophene-tetrathiafulvalene, mnt = maleonitriledithiolate) form a classical ladder structure due to three close S …︁ S interactions (see picture). Below 225 K the double stack of donor molecules forms a spin ladder with two legs, which arises through localization of unpaired electrons in the (DT-TTF)2 dimers.