Structural and electronic properties of ZnO: A first-principles density-functional theory study within LDA(GGA) and LDA(GGA)+U methods

2021 ◽  
Vol 325 ◽  
pp. 114166
Author(s):  
V.N. Jafarova ◽  
G.S. Orudzhev
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
First Principles ◽  
Density Functional ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Structural And Electronic Properties

scholarly journals Effect of BN nanodots on the electronic properties of α- and β-graphyne sheets: a density functional theory study

2019 ◽  
Vol 13 (4) ◽  
pp. 357-364
Author(s):  
R. Majidi ◽  
H. Eftekhari ◽  
H. Bayat ◽  
Kh. Rahmani ◽  
A. M. Khairogli
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
Density Functional ◽  
Band Gaps ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Nanoelectronic Devices ◽  
Hexagonal Shape ◽  
Structural And Electronic Properties ◽  
Cohesive Energies

Abstract The effect of BN nanodots with hexagonal shape on the electronic properties of α- and β-graphyne sheets is investigated. The structural and electronic properties of α- and β-graphyne sheets doped with BN nanodots are studied by using density functional theory. The cohesive energies of the systems indicate all considered structures are thermally stable. It is found that hexagonal BN nanodots can effectively open the band gap in α- and β-graphyne sheets. It means BN nanodots change α- and β-graphyne sheets from semimetal to semiconductor. The BN nanodots with different sizes are considered. It is found that band gaps of the studied α- and β-graphyne sheets doped with BN nanodots increase with the increase in the size of BN nanodots. Hence, α- and β-graphyne sheets doped with BN nanodots are promising materials for use in nanoelectronic devices based on semiconductors.

scholarly journals HfS2 and TiS2 Monolayers with Adsorbed C, N, P Atoms: A First Principles Study

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 94
Author(s):  
Mailing Berwanger ◽  
Rajeev Ahuja ◽  
Paulo Cesar Piquini
Keyword(s):  
Density Functional Theory ◽  
Electronic Properties ◽  
Molecular Species ◽  
First Principles ◽  
Density Functional ◽  
2D Materials ◽  
Metallic Behavior ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Localized Levels

First principles density functional theory was used to study the energetic, structural, and electronic properties of HfS 2 and TiS 2 materials in their bulk, pristine monolayer, as well as in the monolayer structure with the adsorbed C, N, and P atoms. It is shown that the HfS 2 monolayer remains a semiconductor while TiS 2 changes from semiconductor to metallic behavior after the atomic adsorption. The interaction with the external atoms introduces localized levels inside the band gap of the pristine monolayers, significantly altering their electronic properties, with important consequences on the practical use of these materials in real devices. These results emphasize the importance of considering the interaction of these 2D materials with common external atomic or molecular species.

Fine tuning the band-gap of graphene by atomic and molecular doping: a density functional theory study

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 55990-56003 ◽  
Author(s):  
Akhtar Hussain ◽  
Saif Ullah ◽  
M. Arshad Farhan
Keyword(s):  
Density Functional Theory ◽  
First Principles ◽  
Density Functional ◽  
Fine Tuning ◽  
Density Functional Theory Study ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Doped Graphene ◽  
Molecular Doping ◽  
Co Doped

First-principles density functional theory (DFT) based calculations were carried out to investigate the structural and electronic properties of beryllium and nitrogen co-doped and BeN/BeO molecules-doped graphene systems.

First Principles Study on Structural and Electronic Properties of LiFeSO4OH Cathode Material for Lithium Ion Batteries

2014 ◽  
Vol 510 ◽  
pp. 33-38 ◽  
Author(s):  
F.W. Badrudin ◽  
M.S.A. Rasiman ◽  
M.F.M. Taib ◽  
N.H. Hussin ◽  
O.H. Hassan ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Cathode Material ◽  
Electronic Properties ◽  
First Principles ◽  
Density Functional ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Density Of State ◽  
Functional Theory ◽  
Structural And Electronic Properties

Structural and electronic properties of a new fluorine-free cathode material of polyanionichydroxysulfates, LiFeSO4OH withcaminitestructure are studied using first principles density functional theory. From the calculated result, it reveals that antiferromagnetic configuration is more stable compared to ferromagnetic and non-magnetic configuration. Meanwhile, the density of state calculation divulges that this material exhibited large d-d type of band gap and would behave as a Mott-Hubbard insulator. Thus, this behaviour can lead to poor electronic conductivity.

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