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Вид документа : Статья из журнала Шифр издания :
Автор(ы) : Lobach K. A., Ovchinnikov S. G., Ovchinnikova T. M.
Заглавие : Specific features of insulator-metal transitions under high pressure in crystals with spin crossovers of 3d ions in tetrahedral environment
Коллективы :
program for supporting leading scientific schools [NSh-2886.2014.2], Presidium of the Russian Academy of Sciences [2.16]
Место публикации : J. Exp. Theor. Phys.: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 120, Is. 1. - P.132-138. - ISSN 1063, DOI 10.1134/S1063776115010045. - ISSN 10906509(eISSN) Примечания : Cited References:13. - This work was supported by the program for supporting leading scientific schools (project no. NSh-2886.2014.2) and by the Presidium of the Russian Academy of Sciences within program no. 2.16.
Аннотация: For Mott insulators with tetrahedral environment, the effective Hubbard parameter U eff is obtained as a function of pressure. This function is not universal. For crystals with d 5 configuration, the spin crossover suppresses electron correlations, while for d 4 configurations, the parameter U eff increases after a spin crossover. For d 2 and d 7 configurations, U eff increases with pressure in the high-spin (HS) state and is saturated after the spin crossover. Characteristic features of the insulator-metal transition are considered as pressure increases; it is shown that there may exist cascades of several transitions for various configurations.
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