Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1103/PhysRevB.106.235120

Аннотация: The effects associated with interatomic hoppings of excitons and the excitonic Bose condensate formation in strongly correlated spin crossover systems are considered in the framework of the effective Hamiltonian for the two-band Kanamori model. The appearance of antiferromagnetic ordering due to the exciton order is found even in the absence of interatomic exchange interaction. The spectrum of excitonic excitations is calculated at various points of the temperature vs crystal field phase diagram. Outside the region of exciton ordering, the spectrum has a gap, which vanishes at the boundary of the exciton condensate phase. The nonuniform spectral weight distribution over the Brillouin zone is found. The role of electron-phonon interaction is discussed as well. © 2022 American Physical Society.

Журнал: Physical Review B

Выпуск журнала: Vol. 106, Is. 23

Номера страниц: 235120

ISSN журнала: 24699950

Издатель: American Physical Society

• Orlov Y.S. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Nikolaev S.V. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Kuz'min V.I. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Zarubin A.E. (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)
• Ovchinnikov S.G. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation)

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