Three-Dimensional Variable Range Hopping and Thermally Activated Conduction Mechanism of Polypyrrole/Zinc Cobalt Oxide Nanocomposites

2020 ◽  
Vol 124 (39) ◽  
pp. 21772-21781
Author(s):  
Rani Ananda Sutar ◽  
Latha Kumari ◽  
Murugendrappa M. V.
Keyword(s):  
Cobalt Oxide ◽  
Conduction Mechanism ◽  
Three Dimensional ◽  
Variable Range Hopping ◽  
Variable Range ◽  
Thermally Activated ◽  
Dimensional Variable

scholarly journals Electrical Transport Properties ofNi95Ti5Catalyzed Multi wall Carbon Nanotubes Film

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Zishan Husain Khan ◽  
Numan Salah ◽  
Sami Habib
Keyword(s):  
Carbon Nanotubes ◽  
Temperature Region ◽  
Electrical Transport ◽  
Conduction Mechanism ◽  
Variable Range Hopping ◽  
Electrical Transport Properties ◽  
Multi Wall Carbon Nanotubes ◽  
Variable Range ◽  
Temperature Range ◽  
Dimensional Variable

Carbon nanotubes (CNTs) can be understood as one or more graphite sheets rolled up into a seamless cylinder. CNTs have gained much attention and scientific interest due to their unique properties and potential applications since their discovery in 1991. In the present work, we have deposited Ni95Ti5 film using thermal deposition method. Finally, theNi95Ti5catalyzed multi wall carbon nanotubes (MWNTs) are grown on silicon substrate using low pressure chemical vapor deposition (LPCVD) method and the electrical transport properties of this MWNTs film are studied over a temperature range (284–4K) to explain the conduction mechanism. We have suggested two types of conduction mechanism for the entire temperature range. For the temperature region (284–220K), the conduction is due to thermally activated process, whereas the conduction takes place via variable range hopping (VRH) for the temperature range of (220–4K). The VRH mechanism changes from three dimensions to two dimensions as we move down to the temperature below 50K. Therefore, the data for the temperature region (220–50K) is plotted for three dimensional variable range hopping (3D VRH) model and the two dimensional variable range hopping (2D VRH) for lower temperature range of (50–4K). These VRH models give a good fit to the experimental data. Using these models, we have calculated various interesting electrical parameters such as activation energy, density of states, hopping distance and hopping energy.

scholarly journals Transition of conduction mechanism from band to variable-range hopping conduction due to Al doping in heavily Al-doped 4H-SiC epilayers

2019 ◽  
Vol 58 (9) ◽  
pp. 098004 ◽  
Author(s):  
Hideharu Matsuura ◽  
Akinobu Takeshita ◽  
Tatsuya Imamura ◽  
Kota Takano ◽  
Kazuya Okuda ◽  
...  
Keyword(s):  
Conduction Mechanism ◽  
Hopping Conduction ◽  
Variable Range Hopping ◽  
Al Doping ◽  
Variable Range ◽  
Variable Range Hopping Conduction

Thermally activated phase slip and variable range hopping in Tm(Ba2−x Prx )Cu3 O7+δ

2004 ◽  
Vol 1 (7) ◽  
pp. 1891-1894 ◽  
Author(s):  
Z. Mokhtari ◽  
H. Khosroabadi ◽  
M. Akhavan
Keyword(s):  
Variable Range Hopping ◽  
Phase Slip ◽  
Variable Range ◽  
Thermally Activated

Screening of the Coulomb interaction in two-dimensional variable-range hopping

1997 ◽  
Vol 56 (3) ◽  
pp. 1161-1169 ◽  
Author(s):  
F. W. Van Keuls ◽  
X. L. Hu ◽  
H. W. Jiang ◽  
A. J. Dahm
Keyword(s):  
Coulomb Interaction ◽  
Two Dimensional ◽  
Variable Range Hopping ◽  
Variable Range ◽  
Dimensional Variable

Low-dimensional variable range hopping in conducting polymers

2001 ◽  
Vol 117 (1-3) ◽  
pp. 9-13 ◽  
Author(s):  
A.J. Epstein ◽  
W.-P. Lee ◽  
V.N. Prigodin
Keyword(s):  
Conducting Polymers ◽  
Variable Range Hopping ◽  
Variable Range ◽  
Low Dimensional ◽  
Dimensional Variable
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