Luttinger liquid to Al'tshuler-Aronov transition in disordered, many-channel carbon nanotubes.
We present a simple method to increase the conductance of individual template-grown carbon nanotubes contacted with platinum electrodes using a high-bias treatment process which decorates the nanotubes with Pt nanoclusters. The temperature dependence of conductance of the modified carbon nanotubes follows very closely a Luttinger-liquid to Al'tshuler-Aronov anomaly and reveals enhanced number of channels and decreased disorder-density compared to the pristine tubes. Low temperature magnetotransport shows evidence of Rashba spin-orbit coupling, usually absent in bare nanotubes, and a strong suppression of phase coherence at low electronic energies due to electron-electron interactions.
Kar
Swastik
S
Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
Soldano
Caterina
C
Chen
Li
L
Talapatra
Saikat
S
Vajtai
Robert
R
Nayak
Saroj
S
Ajayan
Pulickel M
PM