Anomalies in the optical properties of nanocrystalline copper oxides CuO and Cu2O near the fundamental absorption edge / Gizhevskii B. A.,Sukhorukov Yu. P.,Moskvin A. S.,Loshkareva N. N.,Mostovshchikova E. V.,Ermakova A. E.,Kozlov E. A.,Uimin M. A.,Gaviko V. S. // JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS. - 2006. - V. 102, l. 2. - P. 297-302.

ISSN/EISSN:

1063-7761 / 1090-6509

Type:

Article

Abstract:

A 0.1-0.15-eV displacement of the fundamental absorption edge in the optical absorption spectra of nanocrystalline oxide n-CuO (relative to the position of the fundamental absorption edge in the spectra of CuO single crystals) towards lower energies (red shift) is observed against the background of strong blurring. Nanocrystalline n-Cu2O exhibits a displacement of the fundamental absorption edge towards higher energies (blue shift) by approximately 0.35 eV. The size of crystallites in n-CuO and n-Cu2O ranges from 10 to 90 nm. The blue shift of the fundamental absorption edge of n-Cu2O is typical of classical wide-gap semiconductors and can be explained by size quantization upon a change in the particle size. The anomalous red shift of the fundamental absorption edge of the strongly correlated nanocrystalline oxide n-CuO can be attributed to the highly defective structure of n-CuO, anomalies in the electronic structure of strongly correlated compounds based on 3d metals, and their tendency to electronic phase separation with the formation of metal-like inclusions.

Author keywords:

PHASE-SEPARATION; SINGLE-CRYSTALS; SPECTRA; SEMICONDUCTOR; NANOPARTICLES; CATALYST; CDS

DOI:

10.1134/S1063776106020105

Web of Science ID:

ISI:000237594300010

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	FEB
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6509
Keywords-Plus	PHASE-SEPARATION; SINGLE-CRYSTALS; SPECTRA; SEMICONDUCTOR; NANOPARTICLES; CATALYST; CDS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	gizhevskii@imp.uran.ru
ResearcherID-Numbers	Uimin, Mikhail/K-1319-2013 Mostovshchikova, Elena/J-3623-2013 Sukhorukov, Yuri/J-3588-2013 Gizhevskii, Boris/K-3741-2013 Loshkareva, Natalia/K-1587-2013 Gaviko, Vasilii/K-4632-2013
ORCID-Numbers	Uimin, Mikhail/0000-0003-3906-8101 Mostovshchikova, Elena/0000-0001-8527-3195 Sukhorukov, Yuri/0000-0002-8874-1019 Gizhevskii, Boris/0000-0002-3549-3066 Loshkareva, Natalia/0000-0002-1701-8712 Gaviko, Vasilii/0000-0002-9841-9293
Number-of-Cited-References	37
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	6
Journal-ISO	J. Exp. Theor. Phys.
Doc-Delivery-Number	043II