  Investigating thermal transport in van der Waals heterostructure is of
scientific interest and practical importance for their applications in a broad
range. In this work, thermal conductivity of one-dimensional heterostructure
consisting of carbon and boron nitride nanotubes is systematically investigated
via molecular dynamics simulations. Thermal conductivity is found to have
strong dependences on temperature, length and diameter. In addition, the axial
strain and intensity of van der Waals interaction are demonstrated to be able
to modulate thermal conductivity up to about 43% and 37%, respectively.
Moreover, the dependence of thermal conductivity on the chirality of
componential nanotubes is studied. These results are explained based on lattice
dynamics insights. This work not only provides feasible strategies to modulate
thermal conductivity, but also enhances the understanding of the fundamental
physics of phonon transport in one-dimensional heterostructure.
