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Effects of hydrogen and nitrogen impurities on electronic, structural and optical properties of 2D ZnS graphene based
- Source :
- Journal of Materials Science. 52:10393-10405
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- Ab initio calculations based on density functional theory (DFT) were used to investigate the structural, electronic and optical properties of ZnS graphene based (GB) with N and H atoms as ligands. These studies were conducted using the generalized gradient approximation (GGA) by means of WIEN2k package and revealed how the electronic and optical properties of GB structures of ZnS, including density of electron states, the energy band structure, the dielectric function, the energy loss function, the refractive index, the reflection and absorption rates, are modified by the effects of H and N impurities. Band structure analysis indicated that ZnS GB is a semiconductor with direct band gap (3.4 eV) in Γ direction. Furthermore, it has been found that H (ligand) and N (ligand) atoms that bond to a Zn atom cause magnetic and half-metallic behaviors, and one or two electronic states appeared in the energy gap at down spin for H and N ligands, respectively.
- Subjects :
- Materials science
Band gap
Graphene
Mechanical Engineering
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
WIEN2k
Condensed Matter::Materials Science
Crystallography
Mechanics of Materials
Ab initio quantum chemistry methods
law
0103 physical sciences
Atom
General Materials Science
Density functional theory
Direct and indirect band gaps
010306 general physics
0210 nano-technology
Electronic band structure
Subjects
Details
- ISSN :
- 15734803 and 00222461
- Volume :
- 52
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science
- Accession number :
- edsair.doi...........88deb54ddedbeb9a790cd7aad6d9ea62