Effect of intertube coupling on the electronic structure of carbon nanotube ropes
نویسندگان
چکیده
We calculate the structural and electronic properties of an ordered ‘‘bundle’’ of ~10,10! carbon nanotubes. Our results indicate that intertube coupling causes an additional band dispersion of &0.2 eV and opens up a pseudogap of the same magnitude at EF . Soft librations at n'12 cm 21 are predicted to occur below the orientational melting temperature which marks the onset of tube rotations about their axis. Whereas the density of states near EF increases by 7% due to intertube coupling and by one order of magnitude due to K doping in KC8 , these states do not couple to tube librations. @S0163-1829~98!52340-5#
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تاریخ انتشار 1998