Phonons determine the thermal properties of materials as well as mediating electronic transport. Our research has focused on the physics of phonons, with an emphasis on developing ab initio theoretical descriptions of thermal properties and phonon thermal transport. This parameter-free theory has yielded excellent agreement with the measured thermal conductivities of a wide range of materials, validating its predictive capability and contributing insight into the nature of heat flow. Examples of such
About a decade ago, a little after graphene was discovered, a few theoretical physicists proposed that all solids can be grouped into different classes according to their band structure topologies: depending on which group of the topological families the solid belongs to, it is supposed to carry distinct electronic properties. This notion of topology applied to the band structure of materials gave rise to the birth of topological materials as a new paradigm of condensed matter physics.