title: Pressure control of conducting channels in single-wall carbon nanotube networks.
abstract: We measure electrical transport on networks of single-wall nanotube ropes as a function of temperature T, voltage V, and pressure up to 22 GPa. We observe Luttinger liquid (LL) behavior, a conductance proportional to T(alpha), and a dynamic conductance proportional to V(alpha). With pressure, conductance increases while alpha decreases, enabling us to test the theoretical prediction for LL behavior on the alpha dependence of the T and V independent coefficient of the tunneling conductance, and to obtain the high frequency cutoff of LL modes. The possible transition to a Fermi liquid at alpha-->0 is unattainable, as nanotubes collapse to an insulating state at high pressures.
authors.affiliation: Centre de Recherches sur les Très Basses Températures, Centre Nationale de la Recherche Scientifique, 38042 Grenoble, France.
authors.forename: M
authors.initials: M
authors.lastname: Monteverde
authors.forename: M
authors.initials: M
authors.lastname: Núñez-Regueiro