Frontier investigations on a contemporary family of materials comprise a new class of topological materials that have been discovered in three dimensional (3D) semimetallic crystals. Beyond already unconventional topological quasiparticles in Dirac and Weyl semimetals, nodal-line semimetals provide an even richer platform encompassing robust band-touching manifolds and exotic transport properties.

Manipulation of thermal fluxes is essential in today's science and technology. However, modern thermal phononics relies on the wave interference of phonons and thus is truly efficient either at sub-kelvin temperatures or atomic scales. We propose an alternative concept of heat manipulation based on the particle picture of phonons and their ballistic transport. We call this concept ray phononics as

Metallic transition-metal nitrides (TMNs) are promising conductive ceramics for many applications, whose thermal transport is of great importance. In this article, thermal transport properties of TiN and HfN are investigated through a first-principle-based method with rigorous consideration of phonon and electron scatterings. It is found metallic TiN and HfN hold different thermal transport behaviors

Achieving reliable metallic bonding directly between steel and aluminum alloys has a broad societal impact on sustainability from transportation systems to space exploration and biomedical devices. This is because steel and aluminum alloys are the top two most available and widely used metals. However, the development of detrimental intermetallic compounds (IMCs) at the Al-Fe interface has frustrated