Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Self-trapping of the d-d charge transfer exciton in bulk NiO evidenced by X-ray excited luminescence
AU - Sokolov, V. I.
AU - Pustovarov, V. A.
AU - Churmanov, V. N.
AU - Ivanov, V. Yu
AU - Gruzdev, N. B.
AU - Sokolov, P. S.
AU - Baranov, A. N.
AU - Moskvin, A. S.
PY - 2012/7
Y1 - 2012/7
N2 - Soft X-ray (XUV) excitation did make it possible to avoid the predominant role of the surface effects in luminescence of NiO and revealed a bulk luminescence with a puzzling well isolated doublet of very narrow lines with close energies near 3. 3 eV which is assigned to recombination transitions in self-trapped d-d charge transfer (CT) excitons formed by coupled Jahn-Teller Ni + and Ni 3+ centers. The conclusion is supported both by a comparative analysis of the CT luminescence spectra for NiO and solid solutions Ni xZn 1 - xO, and by a comprehensive cluster model assignment of different p-d and d-d CT transitions, their relaxation channels. To the best of our knowledge, it is the first observation of the luminescence due to self-trapped d-d CT excitons.
AB - Soft X-ray (XUV) excitation did make it possible to avoid the predominant role of the surface effects in luminescence of NiO and revealed a bulk luminescence with a puzzling well isolated doublet of very narrow lines with close energies near 3. 3 eV which is assigned to recombination transitions in self-trapped d-d charge transfer (CT) excitons formed by coupled Jahn-Teller Ni + and Ni 3+ centers. The conclusion is supported both by a comparative analysis of the CT luminescence spectra for NiO and solid solutions Ni xZn 1 - xO, and by a comprehensive cluster model assignment of different p-d and d-d CT transitions, their relaxation channels. To the best of our knowledge, it is the first observation of the luminescence due to self-trapped d-d CT excitons.
KW - ELECTRONIC-STRUCTURE
KW - OPTICAL PROPERTIES
KW - ELECTROREFLECTANCE
KW - EXCITATIONS
KW - IMPURITIES
KW - OXIDES
UR - https://elibrary.ru/item.asp?id=17797385
M3 - Article
VL - 95
SP - 595
EP - 600
JO - Письма в Журнал экспериментальной и теоретической физики
JF - Письма в Журнал экспериментальной и теоретической физики
SN - 0370-274X
IS - 10
ER -
ID: 9335718