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Experimental Evidence: Exchanged Polarons Introducing Ferromagnetic Ordering in Strongly Correlated Electronic Materials of Doped Manganites |
| XIONG Guang-Cheng;MA Yu-Bin;WANG Shi-Qi;SONG Xian-Feng;ZHOU Xin;LIAN Gui-Jun |
| School of Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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XIONG Guang-Cheng, MA Yu-Bin, WANG Shi-Qi et al 2006 Chin. Phys. Lett. 23 1273-1275 |
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Abstract We present direct experimental evidence that ferromagnetic (FM) transition in doped manganites is introduced by exchanged polarons rather than `bare' eg electrons and the FM transition depends on hopping energy of polarons regardless of variation of experimental methods. The observed universal relationships between polaron hopping energy and FM transition suggest a simply polaron exchange picture for understanding the origin of FM ordering in the complex strongly correlated electronic materials of manganites.
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| Keywords:
71.27.+a
75.47.Lx
71.38.Ht
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Published: 01 May 2006
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| PACS: |
71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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75.47.Lx
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(Magnetic oxides)
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71.38.Ht
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(Self-trapped or small polarons)
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