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

被引：6
作者：
Danilchenko, B. A. [1 ]
Tripachko, N. A. [1 ]
Voitsihovska, E. A. [1 ]
Yaskovets, I. I. [1 ]
Uvarova, I. Y. [1 ]
Sundqvist, B. [2 ]
机构：
[1] Inst Phys NASU, UA-03680 Kiev, Ukraine
[2] Umea Univ, Dept Phys, SE-90187 Umea, Sweden
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 47期
关键词：
HYDROGEN SORPTION; CONDUCTION; TRANSPORT; BEHAVIOR;
D O I：
10.1088/0953-8984/25/47/475302
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report experimental results for the changes in conductivity of single-wall carbon nanotube bundles when irradiated by Co-60 gamma-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 atmospheric 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. Our results confirm the existence of the Tomonaga-Luttinger liquid phase up to room temperature in carbon nanotubes after gamma-irradiation to a dose of 5 x10(7) rad in vacuum, 1 : 7 x 10(7) rad in hydrogen and 1 : 24 x 10(8) rad in deuterium.
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页数：7
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