We have investigated the transport properties of various periodic and nonperiodic ${\mathrm{C}}_{60}@(10,10)$ peapod systems by varying the distribution of ${\mathrm{C}}_{60}\mathrm{s}$ encapsulated in the (10,10) nanotube, based on Green function approach within the realistic tight-binding model. The transport properties of the ${\mathrm{C}}_{60}@(10,10)$ systems strongly depend on the distribution of the ${\mathrm{C}}_{60}\mathrm{s}$ encapsulated in the (10,10) nanotube. The periodic systems exhibit the quantized transmissions reflecting their band structure. The transmission of the system with a ${\mathrm{C}}_{120}$ molecule in an infinite array of ${\mathrm{C}}_{60}\mathrm{s}$ has dip structures around the energy levels of the ${\mathrm{C}}_{120}$ molecule, the half widths of which are dependent on the strength of the interaction between the nanotube and the impurity ${\mathrm{C}}_{120}$ molecule.

• Received 28 May 2004
• Accepted 27 October 2004

DOI:https://doi.org/10.1103/PhysRevB.71.115413