Effects of electron-electron interaction in multi-walled carbon nanotubes
E.N. Tkachev, A.I. Romanenko, O.B. Anikeeva
Nonorganic Chemistry Institute of Sibirian Department of Russian Academy of Sciences, Acad. Lavrent'eva ave. 3, Novosibirsk 630090, Russia Novosibirsk state university, street. Pirogova, 2, Novosibirsk, 630090, Russia
V.L. Kuznetsov, and A.N. Usol’tseva
Boreskov Institute of Catalysis Pr. akademika Lavrentieva, 5 Novosibirsk, Russia, 630090 pos Анотація:
Received September 7, 2006
The temperature dependence of electrical
conductivity, s, and the field dependence of magnetic resistivity, r, of catalytic multi-walled carbon nanotubes (MWNTs) with a low content of amorphous carbon have been studied. Below 20 K the s(T) dependences display a contribution of two dimensional quantum corrections. At
T = 4,2 K the r(B) dependences exhibit a negative magnetoresistance due to the dominating
contribution of quantum corrections to magnetoresistance for interacting electrons. A special method of synthetizing has made it possible to prepare MWNTs almost without any impurity of amorphous carbon. This permitted as to reveal the effects of electron–electron interaction not observed in the previous synthetized MWNTs.
73.63.–b Electronic transport in nanoscale materials and structures.