Stability of the Tomonaga–Luttinger liquid state in gamma-irradiated carbon nanotube bundles

Abstract

Stability of the Tomonaga-Luttinger liquid state in gamma-irradiated carbon nanotube bundles. Physics: Condensed Matter, 25(47) Abstract. We report experimental results for the changes in conductivity of single-wall carbon nanotube bundles when irradiatiated by 60 Co  -rays in various environments. In the current study the samples investigated were irradiated in hermetic cells, either evacuated (0.1 Pa) or filled with hydrogen or deuterium at atmosphere pressure. In situ measurements of the resistance change as a function of irradiation dose at room temperature are presented. It was found that for all irradiation conditions, the normalized resistance versus irradiation dose demonstrates a logarithmic behaviour. A phenomenological model for the observed dependence is derived. The current-voltage characteristics of the irradiated samples were measured in the temperature range from 4.5 to 300 K using short (10 ns) electric pulses and the results demonstrate a scaling behaviour. This scaling occurs in the universal coordinates that correspond to the Tomonaga-Luttinger liquid concept. The results obtained confirm the existence of the Tomonaga-Luttinger liquid phase up to room temperature in carbon nanotubes after  -irradiation to a dose of 5x10 7 rad in vacuum, 1.7x10 7 rad in hydrogen and 1.24x10 8 rad in deuterium. Journal of

Low temperature charge transport in arrays of single-walled carbon nanotube bundles with radiation induced defects

“…This behavior of conduction in the weak electric field is typical for conduction of the quasi-one-dimensional systems in the model of the electron gas as the Luttinger liquid, which differs as compared to the Fermi model by the presence of Coulomb interaction resulting in correlated movement of charge carriers [9]. The change of the power exponent α with the irradiation dose and its deviation as compared to α ≈ 0.42 for the non-irradiated samples [12] is related with changing the number of the conduction channels in the CNT bundles as a consequence of appearance of radiation defects.…”

“…In practice, the influence of various irradiation types on the charge transport in the CNT arrays is still poorly known. Modification of functionality of the metallic SWCNT [11] and changes of the Luttinger liquid conductivity in the arrays of bundles of the metallic SWNTs under the Co 60 γ-radiation have been investigated in [12].…”

Вивчення Впливу Вуглецевих Нанотрубок На Електричну Провідність Тернарного Нанокомпозита Пвдф/Пані/ МСВНТ При Низьких Температурах

“…Despite the fact that there are a large number of works where the properties of binary systems containing PANI or CNTs have been researched in detail (see, e.g., works [1,3,6,7,10,11,14,16,17]), the specific features of electric transport in ternary hybrid nanocomposites have not been studied enough. Unlike single-component materials, the mechanisms of charge transfer in multicomponent materials including both CNTs and conducting polymers are more complicated [18][19][20][21][22][23]. One should also bear in mind that the resulting properties of ternary nanocomposites can be affected by the specific interaction between the conducting and non-conducting components, as well as by the distribution of conducting fillers over the dielectric matrix.…”