Propertiesofstrainedzinc-blendeGaN:first-principlesstudy

Kanoun, Mohammed Benali; Merad, A.E.; Cibert, J.; Aourag, H.; Merad, G.

doi:10.1016/j.jallcom.2003.07.005

Cited by 46 publications

(11 citation statements)

References 39 publications

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“…Using the derived theoretical relations for fitting our experimental results, we found that in c-GaN the sign of the bandgap variation with pressure, @E g /@P, is the same as that of the sum (n GaN þ @n GaN =@g zz ). This finding is in accordance with earlier existing theoretical predictions 31,[35][36][37][38] and experimental observations 39 that @E g /@P is positive and @n/@P is negative, thus @n/@g zz is positive. It is worth mentioning that the theoretically predicted negative value of @n/@P are obtained for the transparency region of c-GaN, 31,36,37 hence can be applied to evaluate the sign of @n/@P for our probe radiation, which is below the bandgap of c-GaN.…”

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confidence: 93%

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Großmann

Brick

et al. 2015

Applied Physics Letters

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Confined longitudinal coherent acoustic phonon modes are excited and detected in a sub-lm-thick free-standing cubic GaN membrane by femtosecond pump-probe spectroscopy. After fs laser excitation, Brillouin oscillation and thickness oscillation with frequencies up to 100 GHz are observed and studied in the time domain. We found an initial expansion of the membrane upon optical excitation at 400 nm. Our experimental results confirmed earlier existing theoretical predictions and experimental observations that the hydrostatic deformation potential of cubic GaN is positive. V C 2015 AIP Publishing LLC. [http://dx

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confidence: 93%

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Großmann

Brick

et al. 2015

Applied Physics Letters

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“…1 Nitrides ͑in particular, group III and IV elements͒ are used in numerous applications such as optoelectronic ͑light-emitting diodes and semiconducting lasers͒. Among the group III elements that form nitrides, AlN and GaN have already attracted much of our attention since 2003, [2][3][4][5] and we have covered their physical, structural, and electronic properties using different theoretical methods.…”

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confidence: 99%

Electronic properties of the binary noble metal nitride PtN: First-principles calculations

Kanoun

Goumri‐Said

2005

Phys. Rev. B

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This paper is devoted to the first-principles calculations of electronic properties of the recently synthesized noble metal nitride ͑PtN͒ ͓E. Gregoryanz et al., Nature Material 3, 294 ͑2004͔͒. We report in this work the band structure, and total and partial densities of states, which show the metal character of PtN. These results indicate that there is a strong hybridization between the N͑p͒ states and the Pt͑d͒ states with the energy position. The bonding character of PtN is determined by two competitive processes: a loss in metal-metal bond strength and a gain in energy due to favorable bonding interactions with the Pt atom.

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“…The Charpin method is used for the values of CdTm 2 Y 4 (Y = S, Se), elastic constants (C 11 , C 12 , and C 44 ), and other related parameters . By substituting the values of elastic constants obtained from the Charpin method in the given equations, − the values of various parameters (bulk modulus B , Young’s modulus E , shear modulus G , and anisotropy factor (A)) and Poisson’s ratio (υ) for the Pugh ratio (B/G) for the cubic spinels CdTm 2 S 4 or CdTm 2 Se 4 have been evaluated where and …”

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confidence: 99%

Study of the Influence of Electron Spin in Ferromagnetism and Thermoelectric Characteristics of CdTm₂Y₄ (Y = S, Se) Spinels for Spintronic Applications

Alburaih,

Nazir,

Noor

et al. 2023

ACS Omega

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The current study used full-potential methods to examine the ferromagnetic characteristics of CdTm2Y4(Y= S, Se) spinels; i.e., structural, elastic, electronic, and thermoelectric characteristics of these spinels have been explored for the first time. We used PBEsol-GGA for enthalpy of formation calculations to explain the stability of the ferromagnetic state and calculate the elastic constants and corresponding mechanical modules to reveal the ductile behavior of the materials. The mBJ potential is used instead of PBEsol-GGA to obtain more accurate and precise results of electronic and thermoelectric characteristics. Using mBJ potential leads to complete occupation of the bands in the materials and a clear interpretation of the density of states (DOS). The analysis of the electronic band structure and DOS reveals the stability of the ferromagnetic state in the analyzed materials as a result of p–d hybridization-based exchange splitting of Tm cations in the lattice. The calculations of thermoelectric efficiency are effective in evaluating the aptitude pertinence of the material in waste energy recovery systems and other technological applications. The thermal parameters of these materials are also analyzed to examine their thermal stability over a wide range of temperatures. The results of these calculations are essential for determining the suitability of the materials for use in spintronics-based devices and thermoelectric appliances as these devices rely heavily on the material’s thermoelectric properties.

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Propertiesofstrainedzinc-blendeGaN:first-principlesstudy

Cited by 46 publications

References 39 publications

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Electronic properties of the binary noble metal nitride PtN: First-principles calculations

Study of the Influence of Electron Spin in Ferromagnetism and Thermoelectric Characteristics of CdTm₂Y₄ (Y = S, Se) Spinels for Spintronic Applications

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Propertiesofstrainedzinc-blendeGaN:first-principlesstudy

Cited by 46 publications

References 39 publications

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Study of confined coherent acoustic phonon modes in a free-standing cubic GaN membrane by femtosecond spectroscopy

Electronic properties of the binary noble metal nitride PtN: First-principles calculations

Study of the Influence of Electron Spin in Ferromagnetism and Thermoelectric Characteristics of CdTm2Y4 (Y = S, Se) Spinels for Spintronic Applications

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Product

Resources

About

Study of the Influence of Electron Spin in Ferromagnetism and Thermoelectric Characteristics of CdTm₂Y₄ (Y = S, Se) Spinels for Spintronic Applications