Negative Resistance Behavior of Ferroelectric Bismuth Titanate Ceramics at Low Field

2011 ◽  
Vol 492 ◽  
pp. 234-237 ◽  
Author(s):  
X.A. Mei ◽  
M. Chen ◽  
R. F. Liu ◽  
Y.H. Sun ◽  
J. Liu
Keyword(s):  
Electrical Transport ◽  
Bismuth Titanate ◽  
Differential Resistance ◽  
Negative Resistance ◽  
Voltage Characteristic ◽  
Current Voltage Characteristic ◽  
Conventional Solid State Reaction ◽  
Low Field ◽  
Current Voltage ◽  
Titanate Ceramics

Ferroelectric Bi4Ti3O12ceramics are fabricated by conventional solid-state reaction process. The current-voltage characteristic of Bi4Ti3O12sample exhibits a voltage-controlled negative differential resistance behavior at low field (E≤100V/mm), and an obvious PTC effect appears at around 100°C on the resistance-temperature curve. Based on conducting filament model about electrical transport, instead of Heywang-Jonker model, the experimental results of Bi4Ti3O12ceramics are suitably explained.

Effects of different tailoring graphene electrodes on the rectification and negative differential resistance of molecular devices

2018 ◽  
Vol 32 (29) ◽  
pp. 1850323
Author(s):  
Ting Ting Zhang ◽  
Cai Juan Xia ◽  
Bo Qun Zhang ◽  
Xiao Feng Lu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Electronic Transport ◽  
Negative Differential Resistance ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Differential Resistance ◽  
Voltage Characteristic ◽  
Molecular Devices ◽  
Current Voltage Characteristic ◽  
Functional Theory ◽  
Current Voltage

The electronic transport properties of oligo p-phenylenevinylene (OPV) molecule sandwiched with symmetrical or asymmetric tailoring graphene nanoribbons (GNRs) electrodes are investigated by nonequilibrium Green’s function in combination with density functional theory. The results show that different tailored GNRs electrodes can modulate the current–voltage characteristic of molecular devices. The rectifying behavior can be observed with respect to electrodes, and the maximum rectification ratio can reach to 14.2 in the asymmetric AC–ZZ GNRs and ZZ–AC–ZZ GNRs electrodes system. In addition, the obvious negative differential resistance can be observed in the symmetrical AC-ZZ GNRs system.

scholarly journals Особенности транспорта носителей заряда в структурах n-=SUP=-+-=/SUP=--n-=SUP=-0-=/SUP=--n-=SUP=-+-=/SUP=- с гетеропереходом GaAs/AlGaAs при сверхвысоких плотностях тока

2019 ◽  
Vol 53 (6) ◽  
pp. 816
Author(s):  
С.О. Слипченко ◽  
А.А. Подоскин ◽  
О.С. Соболева ◽  
В.С. Юферев ◽  
В.С. Головин ◽  
...  
Keyword(s):  
Negative Differential Resistance ◽  
Differential Resistance ◽  
Voltage Characteristic ◽  
Balance Model ◽  
Operating Voltage ◽  
Current Voltage Characteristic ◽  
A Value ◽  
Current Voltage ◽  
Algaas Layer ◽  
Current Voltage Characteristics

AbstractThe current–voltage characteristics of n ^+-GaAs/ n ^0-GaAs/ N ^0-AlGaAs/ N ^+-AlGaAs/ n ^+-GaAs isotype heterostructures and n ^+-GaAs/ n ^0-GaAs/ n ^+-GaAs homostructures are studied. It is shown that, for a heterostructure under reverse bias providing the injection of electrons from n ^0-GaAs into N ^0-AlGaAs, the maximum operating voltage reaches a value of 48 V at a thickness of the N ^0-AlGaAs layer of 1 . 0 μm, and the current–voltage characteristic has no region of negative differential resistance. The operation of a homostructure is accompanied by a transition to the negative-differential-resistance region at a voltage of 10 V. Theoretical analysis in terms of the energy-balance model demonstrated that the reverse-biased isotype heterostructure has no negative-differential-resistance region because, in this case, the field domain does not collapse in contrast to what occurs in homostructures.

scholarly journals Electrical Properties of Polypyrrole Conducting Polymer at Various Dopant Concentrations

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
N. Othman ◽  
Z. A. Talib ◽  
A. Kassim ◽  
A. H. Shaari ◽  
J.Y.C. Liew
Keyword(s):  
Conducting Polymer ◽  
Electrical Transport ◽  
Transport Process ◽  
Dopant Concentration ◽  
Voltage Characteristic ◽  
Polymeric Chain ◽  
Variable Range Hopping ◽  
Current Voltage Characteristic ◽  
Current Voltage ◽  
Chemical Reaction Method

Polypyrrole conducting polymer was prepared by chemical reaction method with various concentrations of iron (III) chloride (FeCl3) as dopant. The dc conductivity was obtained from current-voltage characteristic by using parallel-plate techniques in the temperature range of 100-300K. With the involvement of chloride, Cl- in the polymeric chain, the conductivity increased as temperature and the dopant concentration increased. To describe the electrical transport process, Mott’s 1-D, 2-D and 3-D variable range hopping (VRH) models have been considered. The result gives evidence of transport mechanism based on Mott’s 3-D VRH mechanism for all various dopant concentrations studied.

Development and Current-Voltage Characteristic of Arc on AMF Contacts at Different Opening Speeds

2021 ◽  
pp. 1-7
Author(s):  
Alexander A. Logachev ◽  
Irina N. Poluyanova ◽  
Konstantin K. Zabello ◽  
Sergey M. Shkol'nik
Keyword(s):  
Voltage Characteristic ◽  
Current Voltage Characteristic ◽  
Current Voltage

Current oscillations and N-shaped current–voltage characteristic in the manganite Sm1−xSrxMnO3

2004 ◽  
Vol 30 (9) ◽  
pp. 736-738
Author(s):  
I. K. Kamilov ◽  
K. M. Aliev ◽  
Kh. O. Ibragimov ◽  
N. S. Abakarova
Keyword(s):  
Voltage Characteristic ◽  
Current Voltage Characteristic ◽  
Current Voltage ◽  
Current Oscillations
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