Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3
CAO Shuo1,2, ZHOU Qing-Li1, GUAN Dong-Yi1, LU Hui-Bin1, YANG Guo-Zhen1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Physics, University of Liaoning, Shenyang 110036
Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3
CAO Shuo1,2;ZHOU Qing-Li1;GUAN Dong-Yi1;LU Hui-Bin1;YANG Guo-Zhen1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Department 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.
(Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.))
引用本文:
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]. 中国物理快报, 2006, 23(6): 1551-1553.
CAO Shuo, ZHOU Qing-Li, GUAN Dong-Yi, LU Hui-Bin, YANG Guo-Zhen. Simulation of Temperature-Dependent Resistivity for Manganite La1/3Ca2/3MnO3. Chin. Phys. Lett., 2006, 23(6): 1551-1553.
2006, Vol. 23 
