کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1786418 | 1023416 | 2013 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical resistivity of alkali metal doped manganites LaxAyMnwO3 (AÂ =Â Na, K, Rb): Role of electron-phonon, electron-electron and electron-magnon interactions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrical resistivity of alkali metal doped manganites LaxAyMnwO3 (AÂ =Â Na, K, Rb): Role of electron-phonon, electron-electron and electron-magnon interactions Electrical resistivity of alkali metal doped manganites LaxAyMnwO3 (AÂ =Â Na, K, Rb): Role of electron-phonon, electron-electron and electron-magnon interactions](/preview/png/1786418.png)
چکیده انگلیسی
The electrical resistivity behaviour of alkali metal (Na, K, Rb) substitutions at La site in LaxAyMnwO3 (A = Na, K, Rb) manganites is studied caused by electron-phonon, electron-electron and electron-magnon scattering. Substitutions affect average mass and ionic radii of A-site and hence resulting lattice and optical phonon softening. Estimated resistivity compared with reported metallic resistivity, accordingly Ïdiff. = [Ïexp â {Ï0 + Ïe-ph (=Ïac + Ïop)}], infers electron-electron and electron-magnon dependence over most of the temperature range. Electron-phonon contribution indicates that alkali metal K doping provoked larger lattice distortion, while electron-electron interaction is more dominating process for Na and Rb doped compound favouring motion of excess charge carrier. Semiconducting nature is discussed with variable range hopping and small polaron conduction model. The change in activation energies and the density of states at the Fermi-level is consistently explained by cationic disorder and Mn valence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 13, Issue 7, September 2013, Pages 1188-1198
Journal: Current Applied Physics - Volume 13, Issue 7, September 2013, Pages 1188-1198
نویسندگان
Dinesh Varshney, Neha Dodiya,