Raman investigation of the InP lattice dynamics

Bedel, E.; Landa, Georges; Carles, R.; Redoules, J.P.; Renucci, J. B.

doi:10.1088/0022-3719/19/10/004

Cited by 57 publications

(31 citation statements)

References 10 publications

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“…The other two peaks, at 306.4 and 309.4 cm Ϫ1 , do not show any dependence on carrier density. The existence of an additional peak close to the TO mode, which we have also observed in undoped InP, was previously assigned to a second-order overtone of the longitudinal acoustic modes at zone edge 32 lying very close to the TO frequency. Given that a precise value of the TO energy is necessary as an input of the LOPCM line-shape model, it is important to unambiguously identify the TO peak in the Raman spectra.…”

supporting

confidence: 75%

Raman scattering by LO phonon-plasmon coupled modes inn-type InP

et al. 1999

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We have studied LO phonon-plasmon coupled modes by means of Raman scattering in n-InP for carrier densities between 6ϫ10 16 and 1ϫ10 19 cm Ϫ3 . A line-shape theory based on the Lindhard-Mermin dielectric function that takes into account the nonparabolicity of the InP conduction band as well as temperature and finite wave-vector effects is used to fit the Raman spectra and extract accurate values of the electron density. The results obtained from the Lindhard-Mermin model are compared with the charge density determinations based on the Drude and the hydrodynamical models, and the approximations involved in these models are discussed. ͓S0163-1829͑99͒10431-4͔

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supporting

confidence: 75%

Raman scattering by LO phonon-plasmon coupled modes inn-type InP

et al. 1999

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“…Given this close agreement and the computational cost involved, we will neglect spin-orbit coupling for the WZ InP phonon-dispersion calculations. Available experimental phonon-dispersion data [12,35] for ZB InP are also shown in Fig. 1(a).…”

Section: Phonon Dispersionsmentioning

confidence: 99%

“…While an early work [10] using an overlap valence shell model was able to fit the measured ZB InP phonon dispersion [10][11][12], this empirical approach required ten fitting parameters and did not provide significant physical insight. Ab initio lattice-dynamical calculations for ZB InP [13][14][15] using density-functional perturbation theory (DFPT) [16] are in excellent agreement for the measured acoustic branches but overestimate the optical frequencies.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of the phonon dispersion and dielectric properties of wurtzite InP: Role of In4delectrons

Mukhopadhyay

Stewart

2014

Phys. Rev. B

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Although wurtzite InP nanowires have recently been grown, an accurate description of the wurtzite InP phonon dispersion is still missing. We calculate the ab initio phonon dispersion of wurtzite and zinc-blende InP using density-functional perturbation theory and a real space supercell approach. Our predicted optical phonon frequencies agree well with measured Raman data from InP nanowires. We find that treating In 4d electrons as valence electrons is required to accurately describe InP lattice dynamics and dielectric constants, but including spin-orbit coupling has little effect. We also compare the sound velocities and specific heat and find that any difference in the thermal conductivity of InP polytypes should be due to differences in phonon-scattering rates.

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“…Here the surface phonon above the LO mode and the asymmetric shoulder of TO phonon are resolved as separate peaks. The structure above the TO mode is not surface related, it might either be attributed to a secondorder bulk phonon process, the 2LA(K,W), or a disorder-activated TO mode [32]. The peaks of the three localized surface phonons at 258, 274 and 355 cm À1 have slightly larger full widths at half maximum (2.7-3 cm À1 ) than the TO (1.8 cm À1 ) and the LO (2.4 cm À1 ) bulk phonons.…”

Section: Raman Resultsmentioning

confidence: 98%

Electron-Phonon Coupling at InP(110) SurfacesInvestigated by Resonant Raman Spectroscopy

Hinrichs

Frisch

Juhas

et al. 2001

phys. stat. sol. (a)

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Electronic transitions at InP(110) surfaces are investigated by Surface Resonant Raman Spectroscopy (SRRS). Raman measurements of the two localized surface phonon modes at 254 and 270 cm À1 (both of A 0 -symmetry) show distinct resonances, in particular at low temperature (50 K). The deformation potential coupling between surface phonons and electronic surface states is responsible for the resonance effects. Upon cooling, a blue-shift and a significant sharpening of the relevant electronic surface transitions is revealed by Reflectance Anisotropy Spectroscopy (RAS). Characteristic structures in the surface anisotropy function at 2.80, 2.97 and 3.48 eV are assigned to critical points of the surface electronic band structure.

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Raman investigation of the InP lattice dynamics

Cited by 57 publications

References 10 publications

Raman scattering by LO phonon-plasmon coupled modes inn-type InP

Raman scattering by LO phonon-plasmon coupled modes inn-type InP

First-principles study of the phonon dispersion and dielectric properties of wurtzite InP: Role of In4delectrons

Electron-Phonon Coupling at InP(110) SurfacesInvestigated by Resonant Raman Spectroscopy

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