کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1595326 1515689 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic polaron structures in the one-dimensional double and super-exchange model
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Magnetic polaron structures in the one-dimensional double and super-exchange model
چکیده انگلیسی

An analytical and numerical study of the one-dimensional double and super-exchange model is presented. A phase separation between ferromagnetic and anti-ferromagnetic phases occurs at low super-exchange interaction energy. When the super-exchange interaction energy gets larger, the conduction electrons are self-trapped within separate small magnetic polarons. These magnetic polarons contain a single electron inside two or three sites depending on the conduction electron density and form a Wigner crystallization. A new phase separation is found between these small polarons and the anti-ferromagnetic phase. Our results could explain the spin-glass-like behavior observed in the nickelate one-dimensional compound Y 2−xCaxBaNiO5.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 3–4, January 2009, Pages 126–130
نویسندگان
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