Open AccessStudy of single-walled carbon nanotube's differential conductance in high magnetic field under high pressure
Author(s) -
Jian Zhen Cai,
Zhu Hong,
Dongbo Wu,
Feng Liu,
Li Lü
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.6585
Subject(s) - carbon nanotube , hydrostatic pressure , materials science , condensed matter physics , coulomb blockade , carbon nanotube quantum dot , coulomb , magnetic field , electron , nanotube , phase (matter) , conductance , ballistic conduction in single walled carbon nanotubes , optical properties of carbon nanotubes , nanotechnology , physics , voltage , transistor , quantum mechanics , thermodynamics
Accompanied by the structural phase transition, the electron transport properties of single-walled carbon nanotubes bundles undergo a metal-semiconductor transition at a hydrostatic pressure of 1.5 GPa. In the semiconducting phase there coexist two effects——electron phase coherence which leads to two-dimensional electron weak localization, and Coulomb correlation which leads to the environmental quantum fluctuation of charge transport. We applied hydrostatic pressure up to 10 GPa to single-walled carbon nanotube bundles, and studied the bias voltage dependence of the differential conductance at low temperatures and in strong magnetic fields. Our results show that phase coherence and Coulomb correlation are two effects that independently influence on the electron transport process in the semiconducting phase of the single walled carbon nanotube bundles.