Photoinduced insulator-metal transition in the doped manganites Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO_3 and Pr_(0.7)Ca_(0.3)MnO_3: Electronic structure from a self-consistent mean-field approach

Lei Hao; Jun Wang; D. Y. Xing

首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Photoinduced insulator-metal transition in the doped manganites Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO_3 and Pr_(0.7)Ca_(0.3)MnO_3: Electronic structure from a self-consistent mean-field approach

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Photoinduced insulator-metal transition in the doped manganites Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO_3 and Pr_(0.7)Ca_(0.3)MnO_3: Electronic structure from a self-consistent mean-field approach

机译：掺杂的锰铁Pr_（0.55）（Ca_（0.75）Sr_（0.25））_（0.45）MnO_3和Pr_（0.7）Ca_（0.3）MnO_3中的光诱导绝缘体-金属跃迁：自洽平均场法得出的电子结构

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Based on a self-consistent mean-field approach, we study electronic structures of two types of doped manganites, Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO_3 (PCSMO) and Pr_(0.7)Ca_(0.3)MnO_3, by considering both the double-exchange mechanism and Jahn-Teller effect. It is found that for PCSMO either ferromagnetically metallic state or charge-ordered insulator state is stable in a reasonable parameter range, while for Pr_(0.7)Ca_(0.3)MnO_3 the metallic phase cannot be a stable state. These results are consistent with experimental observations that a persistent laser-induced insulator-metal transition could occur in PCSMO, whereas no stable metallic state was detected in Pr_(0.7)Ca_(0.3)MnO_3.

机译：基于自洽平均场方法，我们研究了两种掺杂锰的电子结构，Pr_（0.55）（Ca_（0.75）Sr_（0.25））（0.45）MnO_3（PCSMO）和Pr_（0.7）Ca_ （0.3）MnO_3，同时考虑了双重交换机理和Jahn-Teller效应。发现对于PCSMO，铁磁金属状态或电荷排序的绝缘子状态在合理的参数范围内都是稳定的，而对于Pr_（0.7）Ca_（0.3）MnO_3，金属相不能是稳定状态。这些结果与实验观察一致，即PCSMO中可能发生持久的激光诱导的绝缘体-金属过渡，而Pr_（0.7）Ca_（0.3）MnO_3中未检测到稳定的金属态。

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来源
《Physical review. B, Condensed Matter And Materials Physics》 |2006年第1期|p.014440.1-014440.5|共5页
作者
Lei Hao; Jun Wang; D. Y. Xing;
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作者单位

National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;

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正文语种 eng
中图分类固体物理学;
关键词
manganites; metal-insulator transitions and other electronic transitions; photoconduction and photovoltaic effects; exchange and superexchange interactions;

机译：锰;金属-绝缘体转变和其他电子转变;光电导和光电效应;交换和超交换相互作用;

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机译：多晶PR_（0.55）（CA_（0.75）SR_（0.25））_（0.45）MNO_3化合物：观察大逆磁无限效应的磁性和磁热
4. Microstructures Formed by Charge Ordering Transition in Pr_(0.55)Ca_(0.45)MnO_3 and Nd_(0.5)Sr_(0.5)MnO_3 [C] . Tomoyuki Terai, Nobuki Tamai, Takashi Fukuda, International Symposium on Advanced Structural and Functional Materials Design; 20041110-12; Osaka(JP) . 2004

机译：由Pr_（0.55）Ca_（0.45）MnO_3和Nd_（0.5）Sr_（0.5）MnO_3中的电荷有序跃迁形成的微结构
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Photoinduced insulator-metal transition in the doped manganites Pr_(0.55)(Ca_(0.75)Sr_(0.25))_(0.45)MnO_3 and Pr_(0.7)Ca_(0.3)MnO_3: Electronic structure from a self-consistent mean-field approach

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