Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10669612 | Thin Solid Films | 2015 | 5 Pages |
Abstract
We present the morphology and electrical conductivity of thin films of quasi one-dimensional conductor K0.3MoO3 produced by pulsed laser deposition. Atomic force microscopy reveals granular nature of the films with the texture depending on the substrate and deposition conditions. While the films with better texture have higher conductivity, they all show universal temperature dependence in the temperature range 20Â K-300Â K. The results are analyzed within the models of co-tunneling variable range hopping (VRH) conductivity in granular media based on the Efros-Shklovskii (ES-VRH) model. We suggest two different approaches to interpret the data, either by two ES-VRH regimes with crossover around 45Â K or by a modified ES-VRH regime with T2 pre-factor up to TÂ ~Â 100Â K and an activated one above. The second approach yields a unique value of ES-VRH parameter T0Â =Â 1000Â K in all examined films.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
M. ÄekiÄ, I. JuriÄ, D. Dominko, A. SalÄinoviÄ FetiÄ, D. StareÅ¡iniÄ, K. BiljakoviÄ,