Giant red shift of the absorption spectra due to nonstoichiometry in GdCoO3-delta

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1134/S0021364016030115

Аннотация: The GdCoO3-delta perovskite is a semiconductor with the energy gap E (g) a parts per thousand 0.5 eV from electrical transport measurements. It reveals unusual optical absorption spectra without transparency window expected for semiconductors. Instead we have measured the narrow transmittance peak at the photon energy epsilon(0) = 0.087 eV. To reconcile the transport and optical data we have studied the effect of oxygen vacancies on the electronic structure of the GdCoO3-I '. We have found that oxygen vacancies result in the in-gap states inside the charge-transfer energy gap of the GdCoO3. It is a multielectron effect due to strong electron correlations forming the electronic structure of the GdCoO3-I '. These in-gap states decrease the transparency window and result in a narrow absorption minimum. The predicted temperature dependence of the absorption spectra has been confirmed by our measurements.

Ссылки на полный текст

Издание

Журнал: JETP LETTERS

Выпуск журнала: Vol. 103, Is. 3

Номера страниц: 161-166

ISSN журнала: 00213640

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Ovchinnikov S.G. (Siberian Federal University)
  • Orlov Y.S. (Siberian Federal University)
  • Kuzubov A.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Dudnikov V.A. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Sokolov A.E. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Zabluda V.N. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Shestakov N.P. (Kirensky Institute of Physics,Siberian Branch,Russian Academy of Sciences)
  • Naumov S.B. (Siberian State Technological University)

Вхождение в базы данных

Информация о публикациях загружается с сайта службы поддержки публикационной активности СФУ. Сообщите, если заметили неточности.

Вы можете отметить интересные фрагменты текста, которые будут доступны по уникальной ссылке в адресной строке браузера.