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 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 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.

scholarly journals Spin current distribution in antiferromagnetic zigzag graphene nanoribbons under transverse electric fields

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Zhang ◽  
Eric P. Fahrenthold
Keyword(s):  
Electric Fields ◽  
Transverse Electric ◽  
Graphene Nanoribbons ◽  
Spin Current ◽  
Differential Resistance ◽  
Current Control ◽  
Field Analysis ◽  
Current Transmission ◽  
Transverse Electric Fields ◽  
Zigzag Graphene Nanoribbons

AbstractThe spin current transmission properties of narrow zigzag graphene nanoribbons (zGNRs) have been the focus of much computational research, investigating the potential application of zGNRs in spintronic devices. Doping, fuctionalization, edge modification, and external electric fields have been studied as methods for spin current control, and the performance of zGNRs initialized in both ferromagnetic and antiferromagnetic spin states has been modeled. Recent work has shown that precise fabrication of narrow zGNRs is possible, and has addressed long debated questions on their magnetic order and stability. This work has revived interest in the application of antiferromagnetic zGNR configurations in spintronics. A general ab initio analysis of narrow antiferromagnetic zGNR performance under a combination of bias voltage and transverse electric field loading shows that their current transmission characteristics differ sharply from those of their ferromagnetic counterparts. At relatively modest field strengths, both majority and minority spin currents react strongly to the applied field. Analysis of band gaps and current transmission pathways explains the presence of negative differential resistance effects and the development of spatially periodic electron transport structures in these nanoribbons.

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