Quantum interference and ballistic transmission in nanotube electron waveguides.
The electron transport properties of well-contacted individual single-walled carbon nanotubes are investigated in the ballistic regime. Phase coherent transport and electron interference manifest as conductance fluctuations as a function of Fermi energy. Resonance with standing waves in finite-length tubes and localized states due to imperfections are observed for various Fermi energies. Two units of quantum conductance 2G(0) = 4e(2)/h are measured for the first time, corresponding to the maximum conductance limit for ballistic transport in two channels of a nanotube.
Kong
J
J
Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA.
Yenilmez
E
E
Tombler
T W
TW
Kim
W
W
Dai
H
H
Laughlin
R B
RB
Liu
L
L
Jayanthi
C S
CS
Wu
S Y
SY
D004579:Electron Transport; D008962:Models, Theoretical