First-principles calculations of the effective mass parameters of Al xGa1-xN and Zn xCd1-xTe alloys

Paiva, Rodrigo de Almeida; Nogueira, R. A.; Oliveira, C.; Alves, H. W. Leite; Alves, J.L.A.; Scolfaro, L. M. R.; Leite, J. R.

doi:10.1590/s0103-97332002000200045

Cited by 18 publications

(7 citation statements)

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“…Among numerous theoretical studies of the electron band structure [3,7,8,14,16,20,22,25,29,30], optical parameters [14,15,22,25,30] and effective mass [30][31][32] of CdSe-CdTe compounds, we have not found the corresponding results for the effective mass and elastic properties of Cd 16 Se 15 Te solid state solution corresponding to the tellurium content x = 0.0625. This value of tellurium content may be characteristic of the CdSe 1−x Te x solid state solutions possessing the zinc blend cubic structure.…”

Section: Introductionmentioning

confidence: 69%

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Kashuba¹,

Andriyevsky²,

Ільчук³

et al. 2021

Condens. Matter Phys.

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The electronic band structure and elastic properties of the Cd16Se15Te solid state solution in the framework of the density functional theory calculations are investigated. The structure of the sample is constructed on the original binary compound CdSe, which crystallizes in the cubic phase. Based on the electronic band structure, the effective mass of electron, heavy hole, light hole, spin-orbit effective masses and reduced mass in G point are calculated. In addition, the exciton binding energy, refractive index and high-frequency dielectric constant are calculated. The Young modulus, shear modulus, bulk modulus and Poisson ratio are calculated theoretically. Based on the results of elastic coefficients, the value of acoustic velocity and Debye temperature is obtained.

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Section: Introductionmentioning

confidence: 69%

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Kashuba¹,

Andriyevsky²,

Ільчук³

et al. 2021

Condens. Matter Phys.

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“…Eg [23] /eV 2.7 1.496 ∆ [24] /eV 0.93 0.91 Valence band effective-mass parameters [25] γ 1 4.789 4.67 γ 2…”

Section: Energy Parameterunclassified

Size and temperature effects on electric properties of CdTe/ZnTe quantum rings

Hong¹,

Park²

2011

Chinese Phys. B

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The electronic properties of CdTe/ZnTe quantum rings (QRs) are investigated as functions of size and temperature using an eight-band strain-dependent k•p Hamiltonian. The size effects of diameter and height on the strain distributions around the QRs are studied. We find that the interband transition energy, defined as the energy difference between the ground electronic and the ground heavy-hole subbands, increases with the increasing QR inner diameter regardless of the temperature, while the interband energy decreases with the increasing QR height. This is attributed to the reduction of subband energies in both the conduction and the valence bands due to the strain effects. Our model, in the framework of the finite element method and the theory of elasticity of solids, shows a good agreement with the temperature-dependent photoluminescence measurement of the interband transition energies.

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“…Such a barrier is chosen due to its stability over time compared with other structures. It also has enough bandgap energy to cover (in the energy diagram) the QD structure [15]. It is possible to grow Zn‐based QD structures on nitrides [16].…”

Section: Introductionmentioning

confidence: 99%

Optical gain of Cd_xZn₁₋_xTe quantum dot structures

Abdullah,

Al‐Nashy,

Al‐Khursan

2023

Micro & Nano Letters

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Gain spectra of undoped and doped quantum dot (QD) structures are studied under the inhomogeneous broadening assumption at four mole fractions . For the QD structure, two peaks appear due to the excited state (ES) and ground state (GS) transitions. The gain for the doped structures doubles the undoped ones. The gain increases while the wavelength is reduced with increasing Cd content due to the broader band discontinuity between the QD states. The discontinuity of the bands for each structure (mole fraction) is calculated, which is one of the merits of this work. While the structure offers the peak wavelengths 470 and 630 nm, other mole fractions offer the wavelengths between them. These visible bands are essential in different applications. The effect of QD size effect is also examined. The wavelength is extended by 20 nm for each 1 nm QD height increment.

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First-principles calculations of the effective mass parameters of Al xGa1-xN and Zn xCd1-xTe alloys

Cited by 18 publications

References 0 publications

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Size and temperature effects on electric properties of CdTe/ZnTe quantum rings

Optical gain of Cd_xZn₁₋_xTe quantum dot structures

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First-principles calculations of the effective mass parameters of Al xGa1-xN and Zn xCd1-xTe alloys

Cited by 18 publications

References 0 publications

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Electronic structure and elastic properties of Cd16Se15Te solid state solution: first principles study

Size and temperature effects on electric properties of CdTe/ZnTe quantum rings

Optical gain of CdxZn1−xTe quantum dot structures

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Optical gain of Cd_xZn₁₋_xTe quantum dot structures