Transport properties of Z-shaped phosphorene nanoribbon devices

2020 ◽  
Vol 34 (22) ◽  
pp. 2050229 ◽  
Author(s):  
M. R. Song ◽  
H. L. Shi ◽  
Z. T. Jiang ◽  
Y. H. Ren ◽  
Q. Z. Han
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
First Principles ◽  
Energy Levels ◽  
Differential Conductance ◽  
First Principles Calculations ◽  
Energy Bands ◽  
Transmission Coefficients ◽  
Current Voltage ◽  
Non Equilibrium Green’S Function

By using first-principles calculations and the non-equilibrium Green’s function, we theoretically study the electronic transport properties of a [Formula: see text]-shaped phosphorene nanoribbon (PNR) device, which is called ZSZ-PNR because it is composed of a left zigzag PNR electrode, an intermediate skewed armchair PNR (saPNR), and a right zigzag PNR electrode. First, we investigate the influences of the length and the width of the central saPNR on the ZSZ-PNR transport. The results show that the negative differential conductance (NDC) always appears in the case of the short central saPNR, and is independent of its width, while the NDC is inclined to vanish with the increase of the length. Also, an anomaly on the current–voltage ([Formula: see text]–[Formula: see text]) curves is observed for the ZSZ-PNR with a short saPNR. Next, the transport properties are analyzed according to the evolution of the energy bands of the electrodes, the molecular energy levels (MELs) of the central saPNR, as well as the transmission coefficients, the transmission eigenstates, and the eigenstates of the self-consistent Hamiltonian of the saPNR. Finally, we use a top gate and two parallel gates to manipulate the transport of the ZSZ-PNR, and find that all these gates can strengthen or suppress the ZSZ-PNR transport.

First-principles study of electronic transport properties of graphene nanoribbons with pentagon-heptagon (5-7) line defects

2015 ◽  
Vol 1727 ◽  
Author(s):  
Yasutaka Nishida ◽  
Takashi Yoshida ◽  
Fumihiko Aiga ◽  
Yuichi Yamazaki ◽  
Hisao Miyazaki ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
First Principles ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Edge State ◽  
Line Defect ◽  
Electronic Transport Properties ◽  
Current Voltage ◽  
Line Defects

ABSTRACTIn this study, we investigated the influence of line defects consisting of pentagon-heptagon (5-7) pairs on the electronic transport properties of zigzag-edged and armchair-edged graphene nanoribbons (GNRs). Using the first-principles density functional theory, we study their electronic properties. To investigate their current-voltage (I-V) characteristics at low bias voltage (∼ 1 meV), we use the nonequilibrium Green’s function method. As a result, we found that the conductance of the GNRs having a connected line defect between source and drain shows better performance than that of the ideal zigzag-edged GNRs (ZGNRs). A detailed investigation of the transmission spectra and the wave function around the Fermi level reveals that the line defects arranged along the transport direction work similar to an edge state of the ZGNRs and can be an additional conduction channel. Our results suggest that such a line defect can be effective for low-resistance GNR interconnects.

scholarly journals Symmetry-Dependent Spin Transport Properties and Spin-Filter Effects in Zigzag-Edged Germanene Nanoribbons

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Can Cao ◽  
Mengqiu Long ◽  
Xiancheng Mao
Keyword(s):  
Transport Properties ◽  
First Principles ◽  
Mirror Plane ◽  
First Principles Calculations ◽  
Spin Filter ◽  
Linear Current ◽  
Current Voltage ◽  
Resistance State ◽  
Parallel Configuration ◽  
Dependent Transport

We performed the first-principles calculations to investigate the spin-dependent electronic transport properties of zigzag-edged germanium nanoribbons (ZGeNRs). We choose of ZGeNRs with odd and even widths of 5 and 6, and the symmetry-dependent transport properties have been found, although theσmirror plane is absent in ZGeNRs. Furthermore, even-Nand odd-NZGeNRs have very different current-voltage relationships. We find that the even 6-ZGeNR shows a dual spin-filter effect in antiparallel (AP) magnetism configuration, but the odd 5-ZGeNR behaves as conventional conductors with linear current-voltage dependence. It is found that when the two electrodes are in parallel configuration, the 6-ZGeNR system is in a low resistance state, while it can switch to a much higher resistance state when the electrodes are in AP configuration, and the magnetoresistance of 270% can be observed.

The electronic transport properties of zigzag silicene nanoribbon slices with edge hydrogenation and oxidation

2016 ◽  
Vol 18 (16) ◽  
pp. 11513-11519 ◽  
Author(s):  
Dongqing Zou ◽  
Wenkai Zhao ◽  
Changfeng Fang ◽  
Bin Cui ◽  
Desheng Liu
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
First Principles ◽  
First Principles Calculations ◽  
Electronic Transport Properties

First principles calculations were carried out to investigate the electronic transport properties of H or H2 edge-hydrogenated zigzag silicene nanoribbon (ZSiNR) slices, as well as OH or O edge-oxidized ZSiNR slices connected with H-terminated ZSiNR electrodes.

Multifunctional heterostructures constructed using MoS2 and WS2 nanoribbons

2016 ◽  
Vol 18 (39) ◽  
pp. 27468-27475 ◽  
Author(s):  
Yi Zhou ◽  
Jichen Dong ◽  
Hui Li
Keyword(s):  
Density Functional Theory ◽  
Transport Properties ◽  
Green's Function ◽  
Electronic Transport ◽  
First Principles ◽  
Density Functional ◽  
First Principles Calculations ◽  
Functional Theory ◽  
Electronic Transport Properties ◽  
Nonequilibrium Green's Function

Using first-principles calculations based on nonequilibrium Green's function together with density functional theory, we investigated the electronic transport properties of some devices consisting of armchair and zigzag MoS2NRs/WS2NRs in-plane heterostructures.

First principles study of electronic transport properties in novel FeB2 flake-based nanodevices

2018 ◽  
Vol 20 (6) ◽  
pp. 4455-4465 ◽  
Author(s):  
Jie Li ◽  
Yunrui Duan ◽  
Yifan Li ◽  
Tao Li ◽  
Long-Wei Yin ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
First Principles ◽  
First Principles Calculations ◽  
Electronic Transport Properties ◽  
First Principles Study ◽  
Theoretical Support

First-principles calculations provide theoretical support for the promising applications of innovative two-probe devices based on FeB2 flakes and reveal the superiority of devices with FeB2 flakes at temperatures not above 1000 K in transport properties.

Two-dimensional germanane and germanane ribbons: density functional calculation of structural, electronic, optical and transport properties and the role of defects

RSC Advances ◽  
2016 ◽  
Vol 6 (34) ◽  
pp. 28298-28307 ◽  
Author(s):  
Jun Zhao ◽  
Hui Zeng
Keyword(s):  
Transport Properties ◽  
Green's Function ◽  
First Principles ◽  
Density Functional ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Density Functional Calculation ◽  
Non Equilibrium Green’S Function ◽  
Non Equilibrium

We have performed first principles calculations combined with non-equilibrium Green’s function to study the structural, electronic, optical and transport properties of two-dimensional germanane and germanane ribbons.

Tuning anisotropic electronic transport properties of phosphorene via substitutional doping

2016 ◽  
Vol 18 (37) ◽  
pp. 25869-25878 ◽  
Author(s):  
Caixia Guo ◽  
Congxin Xia ◽  
Lizhen Fang ◽  
Tianxing Wang ◽  
Yufang Liu
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
First Principles ◽  
First Principles Calculations ◽  
Electronic Transport Properties ◽  
Substitutional Doping

Using first-principles calculations, we studied the anisotropic electronic transport properties of pristine and X-doped phosphorene (X = B, Al, Ga, C, Si, Ge, N, As, O, S, and Se atoms).

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