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 firstname.lastname@example.org
Revised: 14 May 2008
Published online: 25 September 2008
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 ∝Tα and a dynamic conductance ∝Vα. 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 αbulk and αend, 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.
PACS: 61.46.Fg – Nanotubes / 62.50.-p – High-pressure effects in solids and liquids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008