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
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Magnetic polaron structures in the one-dimensional double and super-exchange model Magnetic polaron structures in the one-dimensional double and super-exchange model](/preview/png/1595326.png)
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
Journal: Solid State Communications - Volume 149, Issues 3–4, January 2009, Pages 126–130
نویسندگان
E. Vallejo, F. López-Urías, O. Navarro, M. Avignon,