scholarly journals Electronic transport in hybrid contact of doubly-stacked zigzag graphene nanoribbons

2012 ◽  
Vol 61 (7) ◽  
pp. 077201
Author(s):  
Hu Fei ◽  
Duan Ling ◽  
Ding Jian-Wen
Keyword(s):  
Electronic Transport ◽  
Graphene Nanoribbons ◽  
Zigzag Graphene Nanoribbons

scholarly journals Design of boron vacancy enhanced spin filtering graphene/BN zigzag nanoribbon heterojunctions

RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 7368-7374 ◽  
Author(s):  
Xiaohui Jiang ◽  
Dongqing Zou ◽  
Bin Cui ◽  
Changfeng Fang ◽  
Wen Liu ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Electric Field ◽  
Transport Properties ◽  
External Electric Field ◽  
Electronic Transport ◽  
Graphene Nanoribbons ◽  
Electronic Transport Properties ◽  
Spin Polarized ◽  
Boron Nitride Nanoribbons ◽  
Zigzag Graphene Nanoribbons

The spin-polarized electronic transport properties of zigzag graphene nanoribbons (ZGNRs) and boron nitride nanoribbons (ZBNNRs) heterojunctions with a boron vacancy are investigated under an external electric field.

scholarly journals Electronic Transport in the V-Shaped Edge Distorted Zigzag Graphene Nanoribbons with Substitutional Doping

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Nguyen Thanh Tien ◽  
Nguyen Van Ut ◽  
Bui Thai Hoc ◽  
Tran Thi Ngoc Thao ◽  
Nguyen Duy Khanh
Keyword(s):  
Density Functional Theory ◽  
Electronic Transport ◽  
Transmission Spectrum ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Electron Localization ◽  
Functional Theory ◽  
Substitutional Doping ◽  
Electronic Nanodevices ◽  
Zigzag Graphene Nanoribbons

Density-functional theory (DFT) in combination with the nonequilibrium Green’s function formalism is used to study the effect of substitutional doping on the electronic transport properties of V-shaped edge distorted zigzag graphene nanoribbons (DZGNRs), in which DZGNRs with the various widths of four-, six-, and eight-zigzag chains are passivated by H atoms. In this work, Si atoms are used to substitute carbon atoms located at the center of the samples. Our calculated results have determined that Si can change the material type by the number of dopants. We found that the transmission spectrum strongly depends on the various widths. The width of eight-zigzag chains exhibits the largest transmission among four- and six-zigzag chains, and the single Si substitution presents larger transmission than the double case. The obtained results are explained in terms of electron localization in the system due to the presence of distortion at edge and impurities. The relationships between the transmission spectrum, the device density of states, and the I-V curves indicate that DZGNRs are the highly potential material for electronic nanodevices.

Electronic Transport in Oxidized Zigzag Graphene Nanoribbons

MRS Advances ◽  
2017 ◽  
Vol 2 (02) ◽  
pp. 97-101 ◽  
Author(s):  
Venkata Sai Pavan Choudary Kolli ◽  
Vipin Kumar ◽  
Shobha Shukla ◽  
Sumit Saxena
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
Graphene Nanoribbons ◽  
Spin Current ◽  
Relative Orientation ◽  
Graphene Sheets ◽  
Zigzag Edge ◽  
Different Types ◽  
Spin Degeneracy ◽  
Zigzag Graphene Nanoribbons

ABSTRACT The electronic and transport properties of graphene nanoribbons strongly depends on different types of adatoms. Oxygen as adatom on graphene is expected to resemble oxidized graphene sheets and enable in understanding their transport properties. Here, we report the transport properties of oxygen adsorbed zigzag edge saturated graphene nanoribbon. It is interesting to note that increasing the number of oxygen adatoms on graphene sheets lift the spin degeneracy as observed in the transmission profile of graphene nanoribbons. The relative orientation of the oxygen atom on the graphene basal plane is detrimental to flow of spin current in the nanoribbon.

scholarly journals Tuning Electronic Transport Properties of Zigzag Graphene Nanoribbons with Stone-Wales Defect

2018 ◽  
Vol 28 (3) ◽  
pp. 201 ◽  
Author(s):  
Tien Thanh Nguyen ◽  
Hoc Thai Bui ◽  
Ut Van Nguyen ◽  
Tuan Le
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
Density Functional ◽  
Graphene Nanoribbons ◽  
Local Density ◽  
Differential Resistance ◽  
Electronic Transport Properties ◽  
Densities Of States ◽  
Current Characteristics ◽  
Zigzag Graphene Nanoribbons

Influences of the symmetric Stone-Wales (SW) defect on the electronic transport properties of the zigzag graphene nanoribbons (ZGNRs) has been studied using $\it{ab}$ $\it{ initio}$ simulation based on density functional theory (DFT) combined with non-equilibrium Green's function (NEGF) technique. The calculated transmission spectra T(E) at various bias windows, device densities of states (DDOS), current characteristics as well as local density of states (LDOS) of the defective asymmetric and symmetric ZGNRs are presented in comparison of those for the pristine ZGNRs. It has been established the metallic character of the electronic transport in asymmetric ZGNRs, and in symmetric ones, the current has a semiconductor behavior, with negative differential resistance (NDR) effect. Symmetric SW defect, as a most unfavorable SW defect type for electric conductance, remarkably decreases the current values, but does not change the character of conductivity in both the asymmetric and symmetric ZGNRs. NDR has been explained by the altering by SW defect the number of frontier molecular orbitals entering bias windows.

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