Abstract:
We investigated the effects of excited many-electron states in the optical control of the magnetic state in undoped Mott-Hubbard insulator. To derive the spin Hamiltonian in material under optical pumping we have used many-electron approach based on the X-operator representation. Extending the projection operators approach on arbitrary energy spectra of the Mott-Hubbard insulator, we obtained the Hamiltonian of superexchange interaction in analytical form. The Hamiltonian includes the spin-exciton variables which are usually missing in discussion on the magnetic response to optical pumping, and is not additive over contributions from the ground and optically excited states. As a test, a microscopic background for the optical induced superexchange was analyzed in La2CuO4(further La214).
This work was supported by the Foundation for Assistance to Small Innovative Enterprises
(FASIE), Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and
Krasnoyarsk Region Science and Technology Support Fund to the research project 17-42-240212.
We are also grateful to the RFBR grants: 16-02-00273, No.16-02-00098, NSh-7559.2016.2.
Received: 19.08.2017 Received in revised form: 28.10.2017 Accepted: 06.12.2017
Bibliographic databases:
Document Type:
Article
UDC:
537.9
Language: English
Citation:
Semen I. Polukeev, Vladimir A. Gavrichkov, Sergey G. Ovchinnikov, “Effects of optical intra-gap transitions on superexchange interaction in La2CuO4 with nonequilibrium photoexcited centers”, J. Sib. Fed. Univ. Math. Phys., 11:2 (2018), 159–170
\Bibitem{PolGavOvc18}
\by Semen~I.~Polukeev, Vladimir~A.~Gavrichkov, Sergey~G.~Ovchinnikov
\paper Effects of optical intra-gap transitions on superexchange interaction in La$ _2$CuO$ _4$ with nonequilibrium photoexcited centers
\jour J. Sib. Fed. Univ. Math. Phys.
\yr 2018
\vol 11
\issue 2
\pages 159--170
\mathnet{http://mi.mathnet.ru/jsfu664}
\crossref{https://doi.org/10.17516/1997-1397-2018-11-2-159-170}
\isi{https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=Publons&SrcAuth=Publons_CEL&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=000434678300004}
Linking options:
https://www.mathnet.ru/eng/jsfu664
https://www.mathnet.ru/eng/jsfu/v11/i2/p159
This publication is cited in the following 1 articles:
S. I. Polukeev, V. A. Gavrichkov, S. G. Ovchinnikov, “The Ratio of the 90° and 180° Exchange Contributions in Monoxides NiO and CoO at Normal and High Pressure”, Phys. Metals Metallogr., 123:7 (2022), 645
Citation in format AMSBIB
Contact us: