| Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3 |
| |
| 引用本文： | 曹硕 周庆莉 关东仪 吕惠宾 杨国桢. Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3[J]. 中国物理快报, 2006, 23(6): 1551-1553 |
| |
| 作者姓名： | 曹硕 周庆莉 关东仪 吕惠宾 杨国桢 |
| |
| 作者单位： | [1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 [2]Department of Physics, University of Liaoning, Shenyang 110036 |
| |
| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10334070. We would like to thank Professor Jin K. J. for her helpful discussion. |
| |
| 摘 要： | The resistivity of the heavy-doped La1/3Ca2/3MnO3 （LCMO） is simulated using a random resistor network model, based on a phase separation scenario. The simulated results agree well with the reported experimental data, showing a transition from a charge-disordered （CDO） state embedded with a few ferromagnetic （FM） metallic clusters to a charge-ordered （CO） state, corresponding to the transition from a high-temperature paramagnetic （PM） insulating state to a low-temperature antiferromagnetic （AF） insulating state. Furthermore, we find that the number of AF/CO clusters increases with decreasing temperature, and the clusters start to connect to each other around 250K, which causes percolating in the system. The results further verify that phase separation plays a crucial role in the electrical conductivity of LCMO.
|
| 关 键 词： | 电阻率 模拟 水锰矿 随机电阻器 相位分离 |
| 收稿时间： | 2006-02-14 |
| 修稿时间： | 2006-02-14 |
Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3 |
| |
| CAO Shuo,ZHOU Qing-Li,GUAN Dong-Yi,LU Hui-Bin,YANG Guo-Zhen. Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3[J]. Chinese Physics Letters, 2006, 23(6): 1551-1553 |
| |
| Authors: | CAO Shuo ZHOU Qing-Li GUAN Dong-Yi LU Hui-Bin YANG Guo-Zhen |
| |
| Affiliation: | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080Department of Physics, University of Liaoning, Shenyang 110036 |
| |
| Abstract: | The resistivity of the heavy-doped La1/3Ca2/3MnO3 (LCMO) is simulated using a random resistor network model, based on a phase separation scenario. The simulated results agree well with the reported experimental data, showing a transition from a charge-disordered (CDO) state embedded with a few ferromagnetic (FM) metallic clusters to a charge-ordered (CO) state, corresponding to the transition from a high-temperature paramagnetic (PM) insulating state to a low-temperature antiferromagnetic (AF) insulating state. Furthermore, we find that the number of AF/CO clusters increases with decreasing temperature, and the clusters start to connect to each other around 250K, which causes percolating in the system. The results further verify that phase separation plays a crucial role in the electrical conductivity of LCMO. |
| |
| Keywords: | 64.75.+g 75.47.Lx 84.37.+q |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理快报》浏览原始摘要信息 |
|
点击此处可从《中国物理快报》下载免费的PDF全文 |
|
