Extended Drude model analysis of n-doped cuprate, Pr 0.85 LaCe 0.15 CuO 4

IF 0.2 Q4 PHYSICS, APPLIED

Progress in Superconductivity and Cryogenics Pub Date : 2015-12-31 DOI:10.9714/PSAC.2015.17.4.016

Seokbae Lee, D. Song, E. Jung, S. Roh, Changyoung Kim, Jenq-Neng Hwang

引用次数: 0

Abstract

We investigated optical properties of an electron-doped copper oxide high temperature superconductor, Pr0.85LaCe0.15CuO4 (PLCCO) single crystal. We obtained the optical conductivity from measured reflectance at various temperatures. We found our data contained c-axis longitudinal optical (LO) phonon modes due to miscut and intrinsic lattice distortion. We applied an extended Drude model to study the correlations between charge carriers in the system. The LO phonons appear as strong sharp peaks in the optical scattering rate. We tried to remove the LO phonon modes by using the energy loss function, which also shows the LO phonons as peaks, and could not remove them completely. We extracted the electron-boson spectral density function using a generalized Allen's formula. We observed that the resulting electron-boson density show similar temperature dependence as hole-doped cuprates.

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n掺杂铜的扩展Drude模型分析，Pr 0.85 LaCe 0.15 cuo4

研究了电子掺杂氧化铜高温超导体Pr0.85LaCe0.15CuO4 (PLCCO)单晶的光学性质。我们通过测量不同温度下的反射率得到了光导率。我们发现我们的数据包含c轴纵向光学(LO)声子模式由于误切和本征晶格畸变。我们应用扩展的Drude模型来研究系统中载流子之间的相关性。LO声子在光学散射率中表现为强烈的尖峰。我们试图利用能量损失函数去除LO声子模式，但该函数也将LO声子显示为峰值，无法完全去除。我们利用广义艾伦公式提取了电子-玻色子谱密度函数。我们观察到所得的电子-玻色子密度与空穴掺杂铜酸盐具有相似的温度依赖性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Superconductivity and Cryogenics PHYSICS, APPLIED-

CiteScore

0.40

自引率

33.30%

发文量

期刊介绍： Progress in Superconductivity and Cryogenics is the official publication of The Korea Institute of Applied Superconductivity and Cryogenics and the Korean Superconductivity Society. It was launched in 1999, and accepts original research articles and review papers on research on superconductivity and related fields of physics, electronic devices, materials science, large-scale applications for magnets, power and energy, and cryogenics. The Journal is published quarterly in March, June, September, and December each year. Supplemental issues are published occasionally. The official title of the journal is ''Progress in Superconductivity and Cryogenics'' and the abbreviated title is ''Prog. Supercond. Cryog.'' All submitted manuscripts are peer-reviewed by two reviewers. The text must be written in English. All the articles in this journal are KCI and SCOPUS as of 2015. The URL address of the journal is http://psac.kisac.org where full text is available. This work was supported by the Korean Federation of Science and Technology Societies grant funded by the Korea government.