Optical properties of impact diamonds from the Popigai astrobleme / Yelisseyev A.,Meng G. S.,Afanasyev V.,Pokhilenko N.,Pustovarov V.,Isakova A.,Lin Z. S.,Lin H. Q. // DIAMOND AND RELATED MATERIALS. - 2013. - V. 37, l. . - P. 8-16.

ISSN/EISSN:

0925-9635 / нет данных

Type:

Article

Abstract:

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 similar to 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 = 534 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 Cr3+ 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 NV0 centers. (C) 2013 Elsevier B.V. All rights reserved.

Author keywords:

Carbon polytypes; Impact nanostructures; Optical properties; Superhard materials RAMAN-SPECTROSCOPY; CARBON; FILMS; PSEUDOPOTENTIALS; 1ST-PRINCIPLES; LONSDALEITE; SCATTERING; POLYTYPES; DYNAMICS; SPECTRUM

DOI:

10.1016/j.diamond.2013.04.008

Web of Science ID:

ISI:000321536900002

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG
Publisher	ELSEVIER SCIENCE SA
Address	PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Language	English
Keywords-Plus	RAMAN-SPECTROSCOPY; CARBON; FILMS; PSEUDOPOTENTIALS; 1ST-PRINCIPLES; LONSDALEITE; SCATTERING; POLYTYPES; DYNAMICS; SPECTRUM
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	eliseev.ap@mail.ru zslin@mail.ipc.ac.cn
ResearcherID-Numbers	Pokhilenko, Nikolay/B-3211-2014 Yelisseyev, Alexander/A-3846-2014 Lin, Zheshuai/K-6844-2012
ORCID-Numbers	Lin, Zheshuai/0000-0002-9829-9893
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-05-00568a]; National Natural Science Foundation of China {[}11174297, 91022036]; National Basic Research Project of China {[}2010CB630701, 2011CB922204]
Funding-Text	Authors are thankful to I. Kupriyanov and S. Rashchenko for the help in experiments. This work was supported by the Russian Foundation for Basic Research (13-05-00568a), the National Natural Science Foundation of China under Grant Nos. 11174297 and 91022036, and the National Basic Research Project of China (Nos. 2010CB630701 and 2011CB922204).
Number-of-Cited-References	52
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	38
Journal-ISO	Diam. Relat. Mat.
Doc-Delivery-Number	179QR