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Magnetic transitions and excitonic order enhancement in spin crossover strongly correlated electron systems / Yu. S. Orlov, S. V. Nikolaev, S. Ph. Tegai [et al.] // Mater. Today Commun. - 2023. - Vol. 37. - Ст. 107191, DOI 10.1016/j.mtcomm.2023.107191. - Cited References: 53. - The study was supported by the Russian Science Foundation grant No. 22-22-20007, Krasnoyarsk Regional Science Foundation . - ISSN 2352-4928
Кл.слова (ненормированные):
Spin crossover -- Strongly correlated electron systems -- Excitonic order -- Exciton Bose condensation -- Magnetic transitions -- Photoenhancement
Аннотация: The effects of exciton Bose condensation in strongly correlated spin crossover systems are considered within the effective Hamiltonian obtained from the two-orbital Hubbard–Kanamori model. The spectrum of collective excitations at various points of the temperature-crystal field phase diagram is calculated. The role of the electron–phonon interaction is discussed. A novel mechanism of excitonic and related magnetic order photoenhancement in strongly correlated spin crossover systems based on the massive collective phase mode appearance is demonstrated. In addition, we have shown that exciton and associated with it magnetic ordering can be photoinduced outside the exciton condensate phase due to the gap presence in the spectrum of single excitations.

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Держатели документа:
Siberian Federal University, 660041, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Tegai, S.Ph.; Paklin, N.N.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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