Variable range hopping conductivity in nanocrystalline films of K0.3MoO3

被引：2

作者：

Dekic, M. ^{[1
]}

Juric, I. ^{[2
]}

Dominko, D. ^{[2
]}

Fetic, A. Salcinovic ^{[1
]}

Staresinic, D. ^{[2
]}

Biljakovic, K. ^{[2
]}

机构：

[1] Fac Sci, Sarajevo, Bosnia & Herceg

[2] Inst Phys, HR-10001 Zagreb, Croatia

来源：

THIN SOLID FILMS | 2015年 / 591卷

关键词：

Blue bronze; Molybdenum bronze; Potassium molybdenum oxide; Thin films; Variable range hopping; Inelastic co-tunneling; Pulse laser deposition; THIN-FILMS; BEHAVIOR; SYSTEMS; BRONZE; STATE;

D O I：

10.1016/j.tsf.2015.04.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 20 K-300 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 45 K or by a modified ES-VRH regime with T-2 pre-factor up to T similar to 100 K and an activated one above. The second approach yields a unique value of ES-VRH parameter T-0 = 1000 K in all examined films. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：210 / 214

页数：5

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