Vibrational properties of ZnTe at high pressures

Camacho, J.; Loa, I.; Cantarero, A.; Syassen, K.

doi:10.1088/0953-8984/14/4/309

Cited by 45 publications

(36 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our model, VTRSM, has 94.74% improvement over RIM due to inclusion of TBI and VDWI coefficients. Thus, our VTRSM has better agreement with the experimental data than RIM [26]. Our calculations on TOEC are reported in Table 4 and compared with measured data of Prasad [28] on TOEC of ZnTe and the theoretical results of Sorgel and Scherz [29].…”

Section: Phonon Dispersion Curvessupporting

confidence: 53%

See 1 more Smart Citation

Crystal dynamics of zinc chalcogenides III: an application to ZnTe

Dubey¹,

Tiwari²,

Upadhyaya³

et al. 2016

Turk J Phys

View full text Add to dashboard Cite

Abstract:We report the results of a theoretical study on phonon dispersion curves (PDCs) along the three principal symmetry directions, Debye temperature variation, combined density of states (CDS) curves, two-phonon Raman/IR peaks, and anharmonic elastic properties (third order elastic constants and their pressure derivatives) of ZnTe. This new van der Waals three-body force rigid shell model (VTRSM) incorporates the effect of van der Waals interactions and three-body interactions into the rigid shell model of zinc blende structure, where the short range interactions are operative up to the second neighbors. Our results are in good agreement with the available measured data for zinc telluride. It is concluded that this VTRSM will be equally applicable to study the above properties of other zinc blende structure solids.

show abstract

Section: Phonon Dispersion Curvessupporting

confidence: 53%

“…are better than those by using RIM [26]. Our model successfully explained the dispersion of phonons along the three high symmetry directions.…”

Section: Phonon Dispersion Curvesmentioning

confidence: 77%

Crystal dynamics of zinc chalcogenides III: an application to ZnTe

Dubey¹,

Tiwari²,

Upadhyaya³

et al. 2016

Turk J Phys

View full text Add to dashboard Cite

show abstract

“…5 This latter structure, which usually appears at ϳ200 meV below the band gap, seems to be related to misfit dislocations. Some phonon replicas ͑PR͒ of the exciton energies are also observed in our PL spectra ͑see Table I͒. The shift of the hh and lh band gaps can be calculated in terms of the thermal strain 1 ⌬Eϭ ͩ Ϫ2a c 11 Ϫc 12 c 11 Ϯb c 11 ϩ2c 12 c 11 ͪ ⑀.…”

Section: A Photoluminescencementioning

confidence: 66%

Raman spectroscopy and photoluminescence of ZnTe thin films grown on GaAs

Camacho

Cantarero

Hernández‐Calderón

et al. 2002

Journal of Applied Physics

View full text Add to dashboard Cite

We report resonant Raman scattering and photoluminescence ͑PL͒ measurements on two ZnTe thin films grown by molecular-beam epitaxy on GaAs substrates with thicknesses around 0.5 and 1.0 m. The data have been obtained by using the different excitation energies of an Ar ϩ laser to distinguish Raman from PL and analyze resonant effects. The characteristic features of the low-temperature PL spectra are the light and heavy free exciton emissions, split due to the thermal strain effect, followed by several phonon replicas of these lines. Moreover, longitudinal and transversal polariton splittings of heavy excitons are clearly observed. Their reduced masses have been obtained from the exciton binding energies. Room and low-temperature Raman spectra show, besides the typical longitudinal optical ͑LO͒ multiphonon emissions, forbidden zone-center transverse optical (TO)ϩ(nϪ1)LO phonon combinations, which yield an accurate value for the LO and TO phonon energies. The breakdown of the selection rules is attributed to surface faceting.

show abstract

“…At ϳ85 GPa there are indications of a transition to a new phase which remains unchanged up to the highest pressure reached in this material of 93 GPa . A very recent Raman study has found some further evidence for an intermediate phase between cinnabar and Cmcm (Camacho et al, 2002). Although the NaCl structure is not stable in ZnTe at room temperature at any pressure, it has been reported to be stable at high temperature [as cited by Nelmes and McMahon (1998)].…”

Section: Zntementioning

confidence: 99%

High-pressure phases of group-IV, III–V, and II–VI compounds

et al. 2003

View full text Add to dashboard Cite

Advances in the accuracy and efficiency of first-principles electronic structure calculations have allowed detailed studies of the energetics of materials under high pressures. At the same time, improvements in the resolution of powder x-ray diffraction experiments and more sophisticated methods of data analysis have revealed the existence of many new and unexpected high-pressure phases. The most complete set of theoretical and experimental data obtained to date is for the group-IVA elements and the group-IIIA-VA and IIB-VIA compounds. Here the authors review the currently known structures and high-pressure behavior of these materials and the theoretical work that has been done on them. The capabilities of modern first-principles methods are illustrated by a full comparison with the experimental data. CONTENTS

show abstract

Vibrational properties of ZnTe at high pressures

Cited by 45 publications

References 66 publications

Crystal dynamics of zinc chalcogenides III: an application to ZnTe

Crystal dynamics of zinc chalcogenides III: an application to ZnTe

Raman spectroscopy and photoluminescence of ZnTe thin films grown on GaAs

High-pressure phases of group-IV, III–V, and II–VI compounds

Contact Info

Product

Resources

About