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.

A first-principles study of the spin transport properties of a 4H-TAHDI-based multifunctional spintronic device with graphene nanoribbon electrodes

2014 ◽  
Vol 2 (32) ◽  
pp. 6648-6654 ◽  
Author(s):  
P. Zhao ◽  
Q. H. Wu ◽  
H. Y. Liu ◽  
D. S. Liu ◽  
G. Chen
Keyword(s):  
Transport Properties ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Giant Magnetoresistance ◽  
Spin Transport ◽  
Differential Resistance ◽  
Graphene Nanoribbon ◽  
Spintronic Device ◽  
First Principles Study ◽  
Spin Filtering

The 4H-TAHDI-based spintronic device can exhibit perfect giant magnetoresistance, spin-filtering, bipolar spin-rectifying, and negative differential resistance effects simultaneously.

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.

LOCALIZATION OF THE ENERGY STATES OF LEAD INDUCING THE EFFECT OF RECTIFICATION AND NEGATIVE DIFFERENTIAL RESISTANCE PREDICTED BY FIRST-PRINCIPLES STUDY

2013 ◽  
Vol 27 (17) ◽  
pp. 1350081 ◽  
Author(s):  
Y. MIN ◽  
J. H. FANG ◽  
C. G. ZHONG ◽  
Z. C. DONG ◽  
C. P. CHEN ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Reverse Bias ◽  
Forward Bias ◽  
Differential Resistance ◽  
First Principles Calculations ◽  
Rectification Effect ◽  
Potential Applications ◽  
Energy States

The first-principles calculations of the transport characteristics of 4-(5-(2-(5-(4-mercaptophenyl)thiophene-2-yl)ethyl)pyridin-2-yl)benzenethiol sandwiched between two gold leads are performed. The effect of rectification and negative differential resistance (NDR) are obtained, which promise the potential applications in the field of molecular electronics. The rectification effect is 4.49. The peak/valley ratio of the NDR effect is as large as 4.51 for the forward bias and 12.09 for the reverse bias. The strong coupling between gold lead and molecule through thiolate results in the localization of the energy states of gold lead, which may induce the effect of rectification and NDR.

Study on Spin Transport Properties in Transition Metal Atoms Interfered Alpha-Graphyene Nanoribbon Systems

2014 ◽  
Vol 1015 ◽  
pp. 389-392
Author(s):  
Y.H. Zhou ◽  
L.L. Zhou ◽  
X.H. Qiu ◽  
Y.L. Peng
Keyword(s):  
Transition Metal ◽  
Transport Properties ◽  
First Principles ◽  
Differential Resistance ◽  
First Principles Calculations ◽  
Metal Atoms ◽  
Transition Metal Atoms ◽  
Filtering Effect ◽  
Proper Analysis ◽  
Spin Filtering

The transport properties of transition metal atoms interfered alpha-graphyne nanoribbon systems are investigated by first-principles calculations combined with the Keldysh nonequilibrium Green’s method. In all, five types of configurations are considered. We find that intervention of three Cr atom in alpha-graphyne nanoribbon systems decreases the conductivity of the system. Further study show that the magnetic direction of the electrode infulence the spin filtering effect greatly, while the ralative magnetic direction of the three transition Cr atoms have little effect on the transport properties. At finite bias window, negative differential resistance happens. Proper analysis are given to explain the spin filtering phenonmenon and the different transport properties via transmission coefficient and projected density of states.

Negative differential resistance, perfect spin-filtering effect and tunnel magnetoresistance in vanadium-doped zigzag blue phosphorus nanoribbons

2018 ◽  
Vol 20 (32) ◽  
pp. 21105-21112 ◽  
Author(s):  
Si-Cong Zhu ◽  
Shun-Jin Peng ◽  
Kai-Ming Wu ◽  
Cho-Tung Yip ◽  
Kai-Lun Yao ◽  
...  
Keyword(s):  
Transport Properties ◽  
Quantum Transport ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Differential Resistance ◽  
Tunnel Magnetoresistance ◽  
Filtering Effect ◽  
Spin Filtering

We investigate the electronic and transport properties of vanadium-doped zigzag blue phosphorus nanoribbons by first-principles quantum transport calculations.

Influence of spatial distribution of molecule on the switching behavior: A first-principles study

2018 ◽  
Vol 17 (06) ◽  
pp. 1850038 ◽  
Author(s):  
Jingjuan Yang ◽  
Xiaoxiao Han ◽  
Peipei Yuan ◽  
Baoan Bian ◽  
Bin Liao
Keyword(s):  
Spatial Distribution ◽  
Electronic Transport ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Differential Resistance ◽  
Switching Behavior ◽  
Spatial Distributions ◽  
Transmission Spectra ◽  
First Principles Calculations ◽  
Negative Differential Resistance Effect

We perform first-principles calculations to investigate the electronic transport properties of chalcone and flavanone molecules sandwiched between graphene electrodes. These two molecules can be reversibly converted between open and closed states induced by pH, and the significant switching behaviors are observed. The currents and switching ratios are influenced by rotating molecules around the [Formula: see text] axis, which are discussed by the transmission eigenstates, electrostatic potential distributions and transmission spectra. The observed negative differential resistance effect is explained in chalcone configuration. The results suggest that spatial distributions of molecules will influence the performance of devices, indicating a potential application in future molecular circuits.

Spintronic Transport Performances of VSe2 Nanoribbons

2020 ◽  
Vol 15 (2) ◽  
pp. 269-275
Author(s):  
Wei-Chao Zhang ◽  
Wei-Feng Sun
Keyword(s):  
Bias Voltage ◽  
Electronic Transport ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Differential Resistance ◽  
Transmission Spectra ◽  
First Principles Calculations ◽  
Spintronic Devices ◽  
Crystal Anisotropy ◽  
Filtering Effect

The spin-resolved electronic transport behaviors of VSe2 nanoribbons are theoretically investigated to explore their applications in spintronic devices, employing by the first-principles calculations combined with nonequilibrium Green's function scheme. The band structure, current varying curves with bias voltage between nanoribbon terminal electrodes and electronic transmission spectra of two representative VSe2 nanoribbons along zigzag and armchair crystallographic orientations are calculated respectively. The evident negative differential resistance under the bias voltage of ∼0.6 V for the armchair orientation has been found, implying the significant crystal anisotropy of VSe2 monolayer. Meanwhile, both the VSe2 nanoribbon devices along zigzag and armchair directions represent favorable spin filtering effect, suggesting they are prospective candidates as a multifunction material in spintronic and digital applications.

scholarly journals Negative differential resistance and spin filter effects in VS2 monolayers

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 33733-33736
Author(s):  
G. W. Peng ◽  
L. Zhu ◽  
K. L. Yao
Keyword(s):  
Band Structure ◽  
First Principles ◽  
Negative Differential Resistance ◽  
Function Method ◽  
Spin Current ◽  
Differential Resistance ◽  
First Principles Calculations ◽  
Spin Filter ◽  
Non Equilibrium Green’S Function ◽  
Filter Effects

We have calculated the spin current based on the bias voltage, band structure and transmission spectrum for VS2 monolayers along the zigzag and armchair orientations by first-principles calculations combined with the non-equilibrium Green's function method.

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