Unusual elastic constants of cubic MnTe in strained-layer superlattices measured by x-ray diffraction

Buschert, John R.; Peiris, F. C.; Samarth, N.; Luo, Hong‐Gang; Furdyna, J. K.

doi:10.1103/physrevb.49.4619

Cited by 33 publications

(12 citation statements)

References 18 publications

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“…(4) yields a bulk modulus of B 0 ¼ 16ð3Þ GPa. Surprisingly, this value is very close to that of bulk MnTe (15.1 GPa) instead of the one of ZnTe (50.9 GPa) [14]. For the effective superexchange temperature T 0 we also obtained a strong increase with pressure, which is again compatible with a compressibility given by the bulk modulus of MnTe.…”

supporting

confidence: 72%

Magnetoexcitons in Zn0.98Mn0.02Te under High Hydrostatic Pressure

Hamdani

Goi

Syassen

et al. 2001

phys. stat. sol. (b)

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supporting

confidence: 72%

Magnetoexcitons in Zn0.98Mn0.02Te under High Hydrostatic Pressure

Hamdani

Goi

Syassen

et al. 2001

phys. stat. sol. (b)

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“…In general, the phase velocity of these waves depends also on c 11 and c 12 so the results of such measurements were used to check the previous data using the refractive index measured by the Raman scattering (see text below). The set (c 11 , c 12 , c 44 ), the ratio c 11 /2c 12 , and the bulk modulus B given in the literature and determined in the present work. The Brillouin and Raman light scattering data made it possible to determine the refraction index value n for the Ar + laser excitation line.…”

Section: Resultsmentioning

confidence: 99%

“…Present, limited knowledge on these values is given by the extrapolation of the mechanical properties of the mixed crystal Cd 1−x Mn x Te (measured in the composition range x ≤ 0.52) [11]. The analysis of the results of the high-resolution, X-ray diffraction (HRXRD) spectra taken for CdTe/MnTe and ZnTe/MnTe superlattices ( [12,13] and [14], respectively) also gave estimations of the elastic constants c 11 and c 12 or at least their ratio but the accuracy of this approach seems to be rather limited. In particular, some values determined in such a manner (Ref.…”

Section: Introductionmentioning

confidence: 99%

Elastic Properties of Zinc Blende MnTe

et al. 2004

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The Brillouin light scattering was used to investigate elastic properties of the zinc blende, MBE-grown MnTe layer that was deposited on a (001) GaAs substrate covered by CdTe buffer layer. The three elastic constants of the zinc blende MnTe, namely c 11 , c 12 , and c 44 , were directly determined for the first time from the frequency of the Rayleigh mode, of the pseudo--surface mode, and of the shear horizontal bulk mode traveling parallel to the layer surface. The value of c11 was checked using the frequency of longitudinal bulk waves propagating at different angles from the normal of the layer plane. This value was also independently determined by results of the folding of acoustic phonons, observed for MnTe/CdTe superlattices by the Raman scattering. Finally, the bulk modulus given by the formula B = (c11+2c12)/3 was determined for zinc blende MnTe by ab initio calculations making use of the density functional theory and atomic pseudopotentials; spin polarization of MnTe was taken into account. A satisfactory agreement between theoretical and experimental values was obtained.

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“…Within the framework of effective mass approximation, the total Hamiltonian for two electron in CdTe quantum dot is given by Te is given by [9,10] (4)…”

Section: Model and Theorymentioning

confidence: 99%