https://doi.org/10.1140/epjb/e2012-20635-0
Regular Article
Weak localization and dimensional crossover in carbon nanotube systems
1
Dipartimento di Fisica and MINAS Laboratory, Università di Roma
“Tor Vergata”, 00133
Roma,
Italy
2
Dipartimento di Scienze e Tecnologie Chimiche and MINAS
Laboratory, Università di Roma “Tor Vergata”, 00133
Roma,
Italy
a e-mail: cirillo@roma2.infn.it
Received:
4
May
2011
Received in final form:
3
January
2012
Published online:
30
March
2012
We investigate the effects of magnetic and electric fields on electron wavefunction interactions in single walled carbon nanotube bundles. The magnetoresistance measurements performed at 4.2 K and the dependence of the data upon the electric field reveal good agreement with weak localization theory. An electrical field conditioned characteristic length is associated to ohmic-non ohmic transition, observed below 85 K, in current voltage characteristics. This length results equal to the average bundles diameter just at T ≅ 85 K, indicating that 2D-3D crossover is responsible for the observed conductance transition.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012