...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Optical conductivity of perovskite manganites
【24h】

Optical conductivity of perovskite manganites

机译：钙钛矿锰矿的光电导率

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We calculate the optical conductivity σ(ω) for doped rare-earth manganites based on the recently proposed microscopic "two fluid" e—b model. We study the temperature dependence of σ(ω) forLa_0.825Sr_0.i75MnO_3, which has a metallic ground state. At low temperatures, the calculated σ(ω) shows a "two-peak" structure consisting of a far-infrared coherent Drude peak and a broad mid-infrared "polaron" peak, as observed in experiments. Upon heating, the Drude peak rapidly loses spectral weight, and σ(ω) crosses over to having just a single broad mid-infrared peak. The temperature dependence of the mid-infrared peak and the spectral weight transfer between the two peaks are also in agreement with experimental findings. We also study the doping dependence of σ(ω) for the same compound. The integrated spectral weight under the Drude peak increases rapidly as the doping level is increased from an underdoped, insulating state (x = 0.1) to a highly doped, metallic state (x = 0.3), again in agreement with trends seen experimentally.
机译：我们基于最近提出的微观“双流体” eb模型，计算了掺杂稀土锰矿的光导率σ（ω）。我们研究了具有金属基态的La_0.825Sr_0.i75MnO_3的σ（ω）与温度的关系。如在实验中观察到的，在低温下，计算出的σ（ω）显示出一个“两峰”结构，该结构由一个远红外相干德鲁峰和一个宽中红外“极化子”峰组成。加热后，德鲁德峰迅速失去光谱权重，而σ（ω）越过只有一个宽的中红外峰。中红外峰的温度依赖性以及两个峰之间的光谱权重转移也与实验结果一致。我们还研究了相同化合物对σ（ω）的掺杂依赖性。随着掺杂水平从低掺杂的绝缘态（x = 0.1）变为高掺杂的金属态（x = 0.3），在Drude峰下的积分光谱权重迅速增加，这也与实验观察到的趋势一致。

著录项

  • 来源
    《Physical review》 |2011年第8期|p.085115.1-085115.14|共14页
  • 作者

    Nandan Pakhira; H. R. Krishnamurthy; T. V. Ramakrishnan;

  • 作者单位

    Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India,Condensed Matter Theory Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India;

    Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India,Condensed Matter Theory Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India;

    Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560 012, India,Condensed Matter Theory Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560 064, India,Department of Physics, Banaras Hindu University, Varanasi221 005, India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    manganites; polarons and electron-phonon interactions; optical properties of bulk materials and thin films; strongly correlated electron systems; heavy fermions;

    机译：锰矿;极化子和电子-声子相互作用;散装材料和薄膜的光学性能;强相关电子系统;重费米子;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号