Eur. Phys. J. B 65, 511-514 (2008)
https://doi.org/10.1140/epjb/e2008-00364-9

Pressure variation of Luttinger liquid parameters in single wall carbon nanotubes networks

Institut Néel, Centre Nationale de la Recherche Scientifique et Université Joseph Fourier, BP 166, 38042 Grenoble, France

Corresponding author: ^a nunez@grenoble.cnrs.fr

Received: 19 March 2007
Revised: 14 May 2008
Published online: 25 September 2008

Abstract

We measure electrical transport on networks of single wall nanotube of different origin as a function of temperature T, voltage V and pressure P. We observe Luttinger liquid (LL) behavior, a conductance ∝T^α and a dynamic conductance ∝V^α. We observe a sample dependent P variation of the α parameters, interpreted as Fermi level changes due to pressure induced charge transfer. We show how, through standard four-leads and crossed configuration methods, it is possible to determine α_bulk and α_end, respectively. We study and discuss the pressure and doping level dependences of the number of channels N, the LL parameter g and the intra-rope tube-tube coupling constant U within a phenomenological model.