کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1800785 | 1024545 | 2012 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spin crossovers in Mott–Hubbard insulators at high pressures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The high-pressure induced phase transitions initiated by electronic transition in 3d ions from the high-spin (HS) to the low-spin (LS) state (HS-LS spin-crossover) are considered. Behavior of the system with d6 electronic configuration is investigated in the ground state of zero temperature and critical pressure Pc. Magnetic properties of the Mott–Hubbard insulator (Mg1−xFex)O are studied in the vicinity of the quantum critical point (T=0, Pc). At the critical pressure of spin crossover Pc, the spin gap energy εS between HS and LS states is zero. The quantum spins fluctuations HS⇔LS do not require any energy, and the antiferromagnetism is destroyed in the quantum critical point by the first order transition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 21, October 2012, Pages 3538–3541
Journal: Journal of Magnetism and Magnetic Materials - Volume 324, Issue 21, October 2012, Pages 3538–3541
نویسندگان
I.S. Lyubutin, S.G. Ovchinnikov,