3D hopping conduction in SnO2 nanobelts
Abstract
The temperature dependence of the electrical transport of a individual tin oxide nanobelt was measured, in darkness, from 400 to 5K. We found four intrinsic electrical transport mechanisms through the nanobelt. It starts with Thermal-Activation Conduction between 400 and 314K, Nearest-Neighbor Hopping conduction between 268 and 115K, and Variable Range Hopping conduction below 58K, with a crossover from the 3D-Mott to the 3D-Efros-Shklovskii regime at 16K. We claim that this sequence reveal the three-dimensional nature of the electrical transport in the SnO2 nanobelts, even they are expected to behave as one-dimensional systems.
- Publication:
-
Physica Status Solidi Rapid Research Letters
- Pub Date:
- June 2012
- DOI:
- 10.1002/pssr.201206161
- arXiv:
- arXiv:1204.2522
- Bibcode:
- 2012PSSRR...6..262V
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science
- E-Print:
- 3 pages, 4 figures, Accepted for publication on "physica status solidi (RRL) - Rapid Research Letters", DOI: 10.1002/pssr.201206161