scholarly journals Multipeak negative differential resistance from interplay between nonlinear stark effect and double-branch current flow

RSC Advances ◽  
2014 ◽  
Vol 4 (95) ◽  
pp. 52933-52939 ◽  
Author(s):  
Mikołaj Sadek ◽  
Małgorzata Wierzbowska ◽  
Michał F. Rode ◽  
Andrzej L. Sobolewski
Keyword(s):  
First Principles ◽  
Negative Differential Resistance ◽  
Stark Effect ◽  
Current Flow ◽  
Differential Resistance ◽  
Molecular Devices

Multipeak negative differential resistance (NDR) molecular devices are designed from first principles.

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 Edge hydrogenation-induced spin-filtering and negative differential resistance effects in zigzag silicene nanoribbons with line defects

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25244-25252 ◽  
Author(s):  
Xiaoteng Li ◽  
Dongqing Zou ◽  
Bin Cui ◽  
Changfeng Fang ◽  
Jingfen Zhao ◽  
...  
Keyword(s):  
First Principles ◽  
Negative Differential Resistance ◽  
Spin Transport ◽  
Differential Resistance ◽  
First Principles Calculations ◽  
Line Defects ◽  
Silicene Nanoribbons ◽  
Spin Filtering

We investigate the effects of line defects (558-defect and 57-defect) and edge hydrogenation (mono-hydrogenation and di-hydrogenation) on magnetism and spin transport of zigzag silicene nanoribbons (ZSiNRs) by first-principles calculations.

THE INFLUENCE OF THE COUPLING STRENGTH ON THE ELECTRON TRANSPORT THROUGH THE BENZENE-1,4-DITHIOLATE MOLECULAR JUNCTION

2013 ◽  
Vol 27 (16) ◽  
pp. 1350121 ◽  
Author(s):  
YUNJIN YU ◽  
YAOYU LI ◽  
LANGHUI WAN ◽  
BIN WANG ◽  
YADONG WEI
Keyword(s):  
Electron Transport ◽  
Electronic Transport ◽  
Coupling Strength ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Resonant State ◽  
Differential Resistance ◽  
Stable Configuration ◽  
Molecular Junction ◽  
Aluminum Metal

The electronic transport properties of one benzene-1,4-dithiolate molecule coupled by two aluminum metal leads were investigated by using first-principles method. The influence of the coupling distance between the molecule and the electrodes on I–V curve was studied thoroughly. Our calculations showed that when the system is in the most stable configuration, where the system total energy is the lowest, and the electron transport is in off-resonant state. Starting from the most stable configuration, when we gradually increase the distance between the molecule and electrodes and so decreasing the coupling strength of the molecule and electrodes, the conductance, as well as the I–V curve, does not decrease immediately but increase quickly at first. Only when we separate the molecule and electrodes far enough, the current begins to drop quickly. The total scattering charge density was presented in order to understand this phenomenon. A one-level quantum dot model is used to explain it. Finally, negative differential resistance was observed and analyzed.

An Ab Initio Study on Negative Differential Resistance in Pyrrole Trimer Molecular Device

2010 ◽  
Vol 152-153 ◽  
pp. 931-934
Author(s):  
Cai Juan Xia ◽  
Han Chen Liu ◽  
Qiu Ping Wang
Keyword(s):  
Electronic Transport ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Density Functional ◽  
Differential Resistance ◽  
Resonance Peak ◽  
Molecular Device ◽  
Transmission Resonance ◽  
Functional Theory ◽  
Theoretical Results

The electronic transport properties of pyrrole trimer sandwiched between two electrodes are investigated by using nonequilibrium Green’s function formalism combined first-principles density functional theory. Theoretical results show that the system manifests negative differential resistance (NDR) behavior. A detailed analysis of the origin of negative differential resistance has been given by observing the shift in transmission resonance peak across the bias window with varying bias voltage.

Length-dependent rectification and negative differential resistance in heterometallic n-alkanedithiol junctions

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13917-13922 ◽  
Author(s):  
Jian Shao ◽  
X. Y. Zhang ◽  
Yue Zheng ◽  
Biao Wang ◽  
Yun Chen
Keyword(s):  
Transport Properties ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Differential Resistance ◽  
First Principles Calculations

The transport properties of heterometallic n-alkanedithiol junctions were investigated via first-principles calculations.

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