Investigation of temperature-dependent conduction mechanism in MnCo2O4/polypyrrole nanocomposites by three-dimensional variable range hopping (3D-VRH) and band-conduction model

2021 ◽  
Vol 130 (1) ◽  
pp. 015112
Author(s):  
Rani Ananda Sutar ◽  
Latha Kumari ◽  
Murugendrappa M. V.
Keyword(s):  
Conduction Mechanism ◽  
Three Dimensional ◽  
Variable Range Hopping ◽  
Temperature Dependent ◽  
Conduction Model ◽  
Variable Range ◽  
Dimensional Variable ◽  
Band Conduction

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.

Temperature-dependent activation energy and variable range hopping in semi-insulating GaAs

2006 ◽  
Vol 21 (12) ◽  
pp. 1681-1685 ◽  
Author(s):  
R M Rubinger ◽  
G M Ribeiro ◽  
A G de Oliveira ◽  
H A Albuquerque ◽  
R L da Silva ◽  
...  
Keyword(s):  
Activation Energy ◽  
Variable Range Hopping ◽  
Temperature Dependent ◽  
Variable Range

1/f Noise in Mott Variable Range Hopping Conduction in p-type Amorphous Silicon

2015 ◽  
Vol 1770 ◽  
pp. 25-30 ◽  
Author(s):  
V.C. Lopes ◽  
A.J. Syllaios ◽  
D. Whitfield ◽  
K. Shrestha ◽  
C.L. Littler
Keyword(s):  
Electrical Conductivity ◽  
Amorphous Silicon ◽  
Chemical Vapor ◽  
Variable Range Hopping ◽  
Temperature Dependent ◽  
Noise Component ◽  
Variable Range ◽  
Noise Measurements ◽  
P Type ◽  
Hydrogenated Amorphous

ABSTRACTWe report on electrical conductivity and noise measurements made on p-type hydrogenated amorphous silicon (a-Si:H) thin films prepared by Plasma Enhanced Chemical Vapor Deposition (PECVD). The temperature dependent electrical conductivity can be described by the Mott Variable Range Hopping mechanism. The noise at temperatures lower than ∼ 400K is dominated by a 1/f component which follows the Hooge model and correlates with the Mott conductivity. At high temperatures there is an appreciable G-R noise component.

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
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