Electrical and Thermal Properties of C60‐filled Single Wall Carbon Nanotubes

Abstract

We measured temperature‐dependent resistivity ρ, thermal conductivity κ and thermopower S of C60@SWNT (“peapods”). C60 filling reduces ρ much less than alkali metal doping at all T, indicating weak charge transfer. κ is enhanced by filling, the enhancement showing interesting structure vs. T for which we give a tentative explanation. S is reduced at all T by C60 filling, which we explain by a) C60@SWNT blocking some of the oxygen doping sites, and b) weak disorder on the 1‐D chain which reduces the mean free path of tube phonons and thus the phonon drag contribution.