title: Luttinger liquid to Al'tshuler-Aronov transition in disordered, many-channel carbon nanotubes.
abstract: 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.
authors.affiliation: Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
authors.forename: Swastik
authors.initials: S
authors.lastname: Kar
authors.forename: Caterina
authors.initials: C
authors.lastname: Soldano
authors.forename: Li
authors.initials: L
authors.lastname: Chen
authors.forename: Saikat
authors.initials: S
authors.lastname: Talapatra
authors.forename: Robert
authors.initials: R
authors.lastname: Vajtai
authors.forename: Saroj
authors.initials: S
authors.lastname: Nayak
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan