Unusual Transport Properties near the Insulator--Metal Transition in Colossal Magnetoresistive Manganites
YUAN Song-Liu, ZHONG Qiang-Hua, DOYANANDA Debnath, CHEN Wei, ZHAO Li-Feng, MIAO JU-Hong , CAO Heng, LIU Sheng, XIA Zheng-Cai
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
Unusual Transport Properties near the Insulator--Metal Transition in Colossal Magnetoresistive Manganites
YUAN Song-Liu;ZHONG Qiang-Hua;DOYANANDA Debnath;CHEN Wei;ZHAO Li-Feng;MIAO JU-Hong ;CAO Heng; LIU Sheng;XIA Zheng-Cai
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
关键词 ：
75.47.Gk ,
76.30.-v 75.30.Kz
Abstract ： It is argued that a combination of the Griffiths theory and the double-exchange mechanism predicts the random distribution of ferromagnetic metallic clusters above the Curie temperature TC in colossal magnetoresistive manganites. Along this line, we propose a model for the temperature dependence of resistivity that yields a quantitative agreement with experimental data obtained in a typical manganite La2/3 Ca1/3 MnO3 . Our result indicates that the formation and growth of ferromagnetic metallic clusters are responsible for the observation of unusual transport properties near the insulator--metal transition.
Key words ：
75.47.Gk
76.30.-v 75.30.Kz
出版日期: 2005-01-01
引用本文:
YUAN Song-Liu;ZHONG Qiang-Hua;DOYANANDA Debnath;CHEN Wei;ZHAO Li-Feng;MIAO JU-Hong;CAO Heng; LIU Sheng;XIA Zheng-Cai. Unusual Transport Properties near the Insulator--Metal Transition in Colossal Magnetoresistive Manganites[J]. 中国物理快报, 2005, 22(1): 207-210.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2005/V22/I1/207
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