Unpaired electrons located at linear band dispersion (LBD) are exceptional and called Dirac electrons (DE). They are paid attention to because of the unique electronic properties such as temperature (T)-independent resistivity, as if they belong to neither metallic nor non-metallic substances. In this study, we have developed a series of new organic Dirac electron systems and discovered universal features of magnetic behavior originating from LBD.

Unique physical properties of materials have been the center of interest in material science community. Among them, quantum materials have recently garnered growing attention, because of their unprecedented physical properties governed by photon-like electrons. We have synthesized a series of organic compounds of as a new member of quantum materials. After theoretical and experimental examination, we have discovered universal features of magnetic behavior shared by them. Based on our original theoretical model, the behavior is directly related to a characteristic feature of their band structures called linear band dispersion (LBD). Accordingly, such magnetic behavior is intrinsic and universal to quantum materials with LBD. The findings here will accelerate the understanding and application of quantum materials, which will enable advanced information and communication technology that other materials cannot achieve.