ELECTRICAL-RESISTANCE OF A CARBON NANOTUBE BUNDLE

被引:144
作者
LANGER, L
STOCKMAN, L
HEREMANS, JP
BAYOT, V
OLK, CH
VANHAESENDONCK, C
BRUYNSERAEDE, Y
ISSI, JP
机构
[1] KATHOLIEKE UNIV LEUVEN, VASTE STOF FYS MAGNETISME LAB, B-3001 LOUVAIN, BELGIUM
[2] GEN MOTORS RES, DEPT PHYS, WARREN, MI 48090 USA
关键词
D O I
10.1557/JMR.1994.0927
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The first direct electrical resistance measurements performed on a single carbon nanotube bundle from room temperature down to 0.3 K and in magnetic fields up to 14 T are reported. From the temperature dependence of the resistance above 2 K, it is shown that some nanotubes exhibit a semimetallic behavior akin to rolled graphene sheets with a similar band structure, except that the band overlap, DELTA almost-equal-to 3.7 meV, is about 10 times smaller than for crystalline graphite. In contrast to graphite which shows a constant low-temperature resistivity, the nanotubes exhibit a striking increase of the resistance followed by a broad maximum at very low temperatures. A magnetic field applied perpendicular to the sample axis decreases the resistance. Above 1 K, this behavior is consistent with the formation of Landau levels. At lower temperatures, the resistance shows an unexpected drop at a critical temperature which increases linearly with magnetic field. These striking features could be related to the unique quasi-one-dimensional structure of the carbon nanotubes.
引用
收藏
页码:927 / 932
页数:6
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