Effect of uniaxial stress on the zone-center optical phonon of diamond

Grimsditch, M.; Anastassakis, E.; Cardona, M.

doi:10.1103/physrevb.18.901

Cited by 280 publications

(106 citation statements)

References 25 publications

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“…For the diamond sample used in the present work, c(N) is equal to 5.5 × 10 −4 and consequently the produced lattice dilatation ∆a/a is equal to 7.7 × 10 −5 . For small lattice parameter changes, we can assume the equivalence of tensile and compressive stresses and use the bulk modulus of diamond B = 442 GPa −1 and the hydrostatic pressure coefficient of the Raman line of 3.2 cm −1 /GPa [33]. Our calculations show that, for a diamond crystal containing 550 ppm of substitutional nitrogen, a Raman frequency shift of 0.33 cm −1 can be expected.…”

Section: Discussionmentioning

confidence: 93%

Effect of Nitrogen Impurities on the Raman Line Width in Diamond, Revisited

Surovtsev

Kupriyanov

2017

Crystals

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Abstract:The results of a high-resolution Raman scattering study of a diamond crystal with a high content of single substitutional nitrogen impurities (550 ppm) in the temperature range from 50 to 673 K are presented and compared with the data for defect-free diamond. It is established that the increase of the nitrogen concentration in diamond leads to the temperature-independent increase of the Raman line width. Analysis of the experimental data allows us to conclude that this broadening should be attributed to the defect-induced shortening of the Raman phonon lifetime. We believe that this mechanism is responsible for the increase of the Raman line width caused by most point-like defects in diamond. No pronounced effects of the nitrogen defects on the Raman line position and phonon anharmonicity are observed.

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Section: Discussionmentioning

confidence: 93%

Effect of Nitrogen Impurities on the Raman Line Width in Diamond, Revisited

Surovtsev

Kupriyanov

2017

Crystals

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“…4(a) /GPa [44] gives the residual stress of 2 to 5 GPa for diamond. Broadening of the components may be a result of samples nanocrystalline structure [34].…”

Section: Raman Spectramentioning

confidence: 99%

Optical properties of impact diamonds from the Popigai astrobleme

Yelisseyev

Meng

Afanasyev

et al. 2013

Diamond and Related Materials

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Impact diamonds from Popigai astrobleme were found to consist of different carbon phases: cubic and hexagonal diamond with sp 3 bonding according to X-ray structural analysis as well as amorphous, crystalline and disordered graphite with sp 2 -bonding (Raman scattering). The sizes of graphite domains vary from 10 to 100 nm. Fundamental absorption edge for Popigai impact diamonds is shifted~0.5 eV to lower energies in comparison with kimberlite diamonds (5.47 eV) as a result of the lonsdaleite input, in good agreement with ab initio calculations (E g = 5.34 and 4.55 eV for 3C cubic and 2H hexagonal diamonds, respectively). Yellowish color of impact diamonds is due to Rayleigh light scattering on structural defects whereas graphite is responsible for gray to black coloring. In the mid-IR region there is a multi-phonon absorption of 3C diamond in the 1800 to 2800 cm −1 range and some new bands at 969, 1102, 1225, and 1330 cm −1 in the one-phonon region. Micro-Raman study shows inclusions of side noncarbon minerals (quartz, magnetite, and hematite) some of which contain Cr 3+ impurity. The vibration modes of cubic diamond and lonsdaleite exhibited in the Raman spectra were elucidated by the first-principles studies. Popigai impact diamonds demonstrate a broad-band luminescence in 2.1, 2.38, and 2.84 eV components similar to that for nanocrystal polycrystalline 3C diamond. All emissions are excited at band-to-band transitions whereas the last two are observed also at excitation into 2.4 and 3.0 bands supposedly as a result of intracenter processes within the H3(NVN) and NV 0 centers.

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“…The Raman peak (1335.2 cm − 1 ) of diamond film grown at 100 Torr is slightly shifted from the original peak 1332.2 cm − 1 . The positive shift indicates a compressive stress in the film [13]. A broad band at 1580 cm − 1 corresponding to sp 2 -bonded amorphous carbon is present in all the above samples.…”

Section: Resultsmentioning

confidence: 91%