Pressure control of conducting channels in singlewall nanotube networks

Details Pressure control of conducting channels in singlewall nanotube networks Pressure control of conducting channels in singlewall nanotube networks

2004-11-12

arxiv.org/abs/cond-mat/0411325v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.235501

We measure electrical transport on networks of single wall nanotube ropes as a function of temperature T, voltage V and pressure up to 22GPa. We observe Luttinger liquid (LL) behavior, a conductance ~T^alpha and a dynamic conductance ~V^alpha. With pressure conductance increases while alpha decreases, enabling us to test the theoretical prediction for LL on the alpha dependence of the T and V independent coefficient of the tunneling conductance, and to obtain the high frequency cut-off 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.

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