NiGa2S4 http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.99.157203 http://journals.aps.org/prb/pdf/10.1103/PhysRevB.77.054429 http://www.sciencemag.org/content/309/5741/1697.long Tf=10KYb2Pt2Pb http://www.issp.u-tokyo.ac.jp/maincontents…