Jarillo-Herrero’s group explores quantum transport and optoelectronics in novel condensed matter systems such as graphene, transition metal dichalcogenides, and topological insulators. In recent work, he has demonstrated the presence of a bandgap in graphene-based van der Waals heterostructures, novel quantum spin Hall and photothermoelectric effects in graphene, as well as light-emitting diodes, photodetectors, and solar cells in the atomically thin tungsten diselenide system. He has also made advances in characterizing and manipulating the properties of other ultrathin materials, such as ultra-thin graphite and molybdenum disulphide, which lack graphene’s ultrarelativistic properties, but possess other unusual electronic and electronic properties. Jarillo-Herrero has co-authored over 60 journal publications and directed 4 PhD thesis.