Low-temperature electronic transport in Pt-nanocluster decorated alumina template grown carbon nanotubes

Alumina template grown nanotubes are known to be highly disordered tube when compared to arc-discharge grown tubes. This is due to the particular type of growth process involved. Temperature dependence study reveals a slow power law dependence of the conductance as a function of the temperature. Large value of power law exponents found in pristine tubes, suggest that the transport mechanism takes place through tunneling between adjacent graphene flakes. When platinum-decorated, those devices show a L\"{u}ttinger liquid behavior in the high-T regime and a large suppression of the conductance at low-T due to the interplay of disorder and $e-e$ interactions. Transport properties are studied in light of a recently proposed model for disordered multi-channel quantum wires. Magneto-transport measurements ($\vert $B$\vert <$5T) show the presence of weak localization and a small but distinct Rashba spin-orbit scattering effect in the low-field regime ($\vert $B$\vert <$.5T), the latter attributed to the surface decoration. Coherent transport is found to be recovered with increasing applied electric field.