Тип публикации: статья из журнала
Год издания: 2008
Идентификатор DOI: 10.1134/S1063776108070145
Ключевые слова: High pressures, Mott Hubbard transitions, Spin crossovers, Spin dynamics
Аннотация: The effect of spin crossovers in d (n) terms on the effective Hubbardparameter (U(eff)) determining the gap between the lower and upper Hubbard bands is analyzed using a many-electron approach to describe the electron structure of Mott insulators. A new mechanism of the insulator-metal transition is established for d(5) ions, whichПоказать полностьюis related to a decrease in U(eff) caused by spin crossover. For other ions, the U (eff) value is either independent of pressure (d(2), d(4), d(7)) or it exhibits nonmonotonic growth (d(3), d(6), d(8)).
Журнал: JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
Выпуск журнала: Vol. 107, Is. 1
Номера страниц: 140-146
ISSN журнала: 10637761
Место издания: NEW YORK
Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER