Reducing the thermal conductivity of carbon nanotubes below the random isotope limit
Gabriel Stoltz, Natalio Mingo, Francesco Mauri
Physical Review B
We find that introducing segmented isotopic disorder patterns may considerably reduce the thermal conductivity of pristine carbon nanotubes below the uncorrelated disorder value. This is a result of the interplay between different length scales in the phonon scattering process. We use ab-initio atomistic Green's function calculations to quantify the effect of various types of segmentation similar to that experimentally produced by coalescence of isotope-engineered fullerenes.