scholarly journals Optical and electronic properties of lithium thiogallate (LiGaS2): experiment and theory

RSC Advances ◽  
2020 ◽  
Vol 10 (45) ◽  
pp. 26843-26852
Author(s):  
Tuan V. Vu ◽  
A. A. Lavrentyev ◽  
B. V. Gabrelian ◽  
Dat D. Vo ◽  
Pham D. Khang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Electronic Properties ◽  
Theoretical Calculations ◽  
Optical And Electronic Properties

We report the relation between the optical properties and electronic structure of lithium thiogallate (LiGaS2) by performing XPS and XES measurements and theoretical calculations.

Manipulating the optical and electronic properties of MoO3 films through electric-field-induced ion migration

2021 ◽  
Author(s):  
Xiaoxia Wang ◽  
Fanfan Du ◽  
Yingmei Zhang ◽  
Jie Yang ◽  
Xiaoli Li ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Optical Properties ◽  
Electric Field ◽  
Electronic Properties ◽  
Hydrogen Ions ◽  
Lithium Ions ◽  
Ion Migration ◽  
Electronic And Optical Properties ◽  
Acidic Ionic Liquid ◽  
Optical And Electronic Properties

The intercalation of hydrogen ions and lithium ions in MoO3 films is realized by acidic ionic liquid gating, which modifies the electronic and optical properties of MoO3 films, is promising for designing multifunctional devices.

scholarly journals Effect of Electronic Correlations on the Electronic Structure, Magnetic and Optical Properties of the Ternary RCuGe Compounds with R = Tb, Dy, Ho, Er

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3536
Author(s):  
Alexey V. Lukoyanov ◽  
Lubov N. Gramateeva ◽  
Yury V. Knyazev ◽  
Yury I. Kuz’min ◽  
Sachin Gupta ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Theoretical Calculations ◽  
Rare Earth Ions ◽  
Local Spin Density Approximation ◽  
Electron Correlations ◽  
Absorption Region ◽  
Densities Of States ◽  
Interband Light Absorption ◽  
Good Agreement

In this study, the ab initio and experimental results for RCuGe ternary intermetallics were reported for R = Tb, Dy, Ho, Er. Our theoretical calculations of the electronic structure, employing local spin density approximation accounting for electron–electron correlations in the 4f shell of Tb, Dy, Ho, Er ions were carried in DFT+U method. The optical properties of the RCuGe ternary compounds were studied at a broad range of wavelengths. The spectral and electronic characteristics were obtained. The theoretical electron densities of states were taken to interpret the experimental energy dependencies of the experimental optical conductivity in the interband light–absorption region. From the band calculations, the 4f shell of the rare-earth ions was shown to provide the major contribution to the electronic structure, magnetic and optical properties of the RCuGe intermetallics. The accounting for electron–electron correlations in Tb, Dy, Ho, Er resulted in a good agreement between the calculated and experimental magnetic and optical characteristics.

Stabilization of ZnS nanoparticles by polymeric matrices: syntheses, optical properties and recent applications

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64400-64420 ◽  
Author(s):  
Ashish Tiwari ◽  
S. J. Dhoble
Keyword(s):  
Optical Properties ◽  
Electronic Properties ◽  
Hybrid Materials ◽  
Optical Studies ◽  
Zns Nanoparticles ◽  
Polymeric Matrices ◽  
Optical And Electronic Properties ◽  
Potential Applications ◽  
Promising Area

ZnS nanocomposites is a promising area of research for designing novel functional hybrid materials due to their unique optical and electronic properties. This review emphasizes on the synthesis, optical studies and potential applications.

Electronic and optical properties of AlN under pressure: DFT calculations

2017 ◽  
Vol 31 (02) ◽  
pp. 1650255
Author(s):  
Sahar Javaheri ◽  
Arash Boochani ◽  
Manuchehr Babaeipour ◽  
Sirvan Naderi
Keyword(s):  
Optical Properties ◽  
Electronic Properties ◽  
Dielectric Function ◽  
First Principles ◽  
Density Functional ◽  
Functional Theory ◽  
Zinc Blende ◽  
Rocksalt Phase ◽  
Optical And Electronic Properties ◽  
Theoretical Results

Structural, elastic, optical, and electronic properties of wurtzite (WZ), zinc-blende (ZB), and rocksalt (RS) structures of AlN are investigated using the first-principles method and within the framework of density functional theory (DFT). Lattice parameters, bulk modulus, shear modulus, Young’s modulus, and elastic constants are calculated at zero pressure and compared with other experimental and theoretical results. The wurtzite and zinc-blende structures have a transition to rocksalt phase at the pressures of 12.7 GPa and 14 GPa, respectively. The electronic properties are calculated using both GGA and EV-GGA approximations; the obtained results by EV-GGA approximation are in much better agreement with the available experimental data. The RS phase has the largest bandgap with an amount of 4.98 eV; by increasing pressure, this amount is also increased. The optical properties like dielectric function, energy loss function, refractive index, and extinction coefficient are calculated under pressure using GGA approximation. Inter-band transitions are investigated using the peaks of imaginary part of the dielectric function and these transitions mainly occur from N-2[Formula: see text] to Al-3[Formula: see text] levels. The results show that the RS structure has more different properties than the WZ and ZB structures.

Optical Properties and Electronic Structure of LaNi5-XCux (x=0–1.2) Intermetallic System

2010 ◽  
Vol 168-169 ◽  
pp. 529-532 ◽  
Author(s):  
Yu.V. Knyazev ◽  
Y.I. Kuz’min ◽  
A.V. Lukoyanov ◽  
Anatoly G. Kuchin
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Optical Conductivity ◽  
Theoretical Calculations ◽  
Generalized Gradient ◽  
Broad Absorption ◽  
Generalized Gradient Approximation ◽  
Electron Transitions ◽  
Intermetallic System ◽  
Conductivity Spectra

Optical properties of the LaNi5-xCux (x = 0, 0.6, 1, 1.2) compounds were studied. It was shown that substitution of copper for nickel led to noticeable changes in the optical conductivity spectra. Calculations of the electronic structure of compounds with x = 0, 1, 2 were performed using a generalized gradient approximation. The interband optical conductivity of these intermetallics was calculated. The optical ellipsometrical measurements and theoretical calculations testify to the appearance of a broad absorption structure associated with the Cu 3d  Ni 3d electron transitions and increasing with the growth of copper content.

scholarly journals Optical and Electronic Properties of Semiconductor 2D Nanosystems: Self-consistent Tight-binding Calculations

VLSI Design ◽  
1998 ◽  
Vol 8 (1-4) ◽  
pp. 469-473
Author(s):  
Andrea Reale ◽  
Aldo Di Carlo ◽  
Sara Pescetelli ◽  
Marco Paciotti ◽  
Paolo Lugli
Keyword(s):  
Optical Properties ◽  
Electronic Properties ◽  
Function Approximation ◽  
Tight Binding ◽  
The Self ◽  
Optical And Electronic Properties ◽  
Self Consistent ◽  
Binding Models ◽  
Band Profile ◽  
Band Mixing

A tight-binding models which account for band mixing, strain and external applied potentials in a self-consistent fashion has been developed. This allows us to describe electronic and optical properties of nanostructured devices beyond the usual envelope function approximation. This model can be applied to direct and indirect gap semiconductors thus allowing for instance the self-consistent calculation of band profile and carrier control in pseudomorphic InGaAs/GaAs HEMTs and SiGe/Si MODFETs.

Artificial Atoms in Magnetic Field: Electronic and Optical Properties

1998 ◽  
Vol 12 (05) ◽  
pp. 471-502 ◽  
Author(s):  
R. Rinaldi
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
Magnetic Fields ◽  
Electronic Properties ◽  
Semiconductor Heterostructures ◽  
High Magnetic Fields ◽  
Correlation Effects ◽  
Particle Theory ◽  
Artificial Atoms ◽  
Optical And Electronic Properties

Quantum dots semiconductor heterostructures exhibit optical and electronic properties similar to those of real atoms, due to the delta like dispersion of the density of states. The study of the optical and electronic properties of artificial atoms in high magnetic fields allows the observation of quantum effects typical of the atomic physics. In this work we review the problem of artificial atoms in magnetic fields starting from the single-particle theory up to the problems encountered in the observation of correlation effects when two or more carriers are confined in the dot. The main experiments elucidating the change of the optical and electronic properties of artifical atoms in magnetic fields are also reviewed.

Anisotropy of Structure and Optical Properties of Self-Assembled and Oriented Colloidal CdSe Nanoplatelets

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1619-1630 ◽  
Author(s):  
Artsiom Antanovich ◽  
Anatol Prudnikau ◽  
Mikhail Artemyev
Keyword(s):  
Optical Properties ◽  
Electronic Properties ◽  
Spatial Orientation ◽  
Colloidal Synthesis ◽  
Structural And Optical Properties ◽  
One Dimensional ◽  
Optical And Electronic Properties ◽  
Cadmium Chalcogenide ◽  
Great Progress ◽  
Atomically Flat

Abstract Atomically flat colloidal nanoplatelets with strong one-dimensional confinement represent the most recently discovered type of quantum-confined cadmium chalcogenide nanocrystals. In almost a decade a great progress has been achieved in the colloidal synthesis of nanoplatelets and understanding of their basic optical and electronic properties. However, up until recently methods of their controlled spatial orientation were quite scarce, what in turn hindered obtaining reliable information on their anisotropic structural and optical properties arising from their shape. In this paper we provide a mini-review of recent advances in this field of study.

scholarly journals Nanobismuth: Fabrication, Optical, and Plasmonic Properties—Emerging Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-23 ◽  
Author(s):  
Ye Tian ◽  
Johann Toudert
Keyword(s):  
Twentieth Century ◽  
Optical Properties ◽  
Electronic Properties ◽  
Spectral Range ◽  
Optical Potential ◽  
Near Infrared ◽  
Theoretical Calculations ◽  
Far Infrared ◽  
Free Carrier ◽  
Optical Resonances

Along the twentieth century, the electronic properties of bismuth have been widely studied, especially in relation with its magnetoresistive and thermoelectric responses. In this context, a particular emphasis has been made on electronic confinement effects in bismuth nanostructures (or nanobismuth). In the recent years, the optical properties of bismuth nanostructures are focusing a growing interest. An increasing number of reports point at the potential of such nanostructures to support plentiful optical resonances over an ultrabroad spectral range: “interband plasmonic” resonances in the ultraviolet, visible, and near-infrared; dielectric Mie resonances in mid- and far-infrared; and conventional free-carrier plasmonic resonances in the far-infrared and terahertz. With the aim to provide a comprehensive basis for exploiting the full optical potential of bismuth nanostructures, we review the current progress in their controlled fabrication, the trends reported (from theoretical calculations and experimental observations) for their optical and plasmonic response, and their emerging applications, including photocatalysis and switchable metamaterials.

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