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首页> 外文期刊>Journal of Superconductivity >Interpretation of resistivity of Nd{sub}1.85Ce{sub}0.15CuO{sub}4: electron-phonon mechanism
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Interpretation of resistivity of Nd{sub}1.85Ce{sub}0.15CuO{sub}4: electron-phonon mechanism

机译：Nd {sub} 1.85Ce {sub} 0.15CuO {sub} 4的电阻率解释：电子声子机理

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摘要

The temperature-dependent normal state resistivity of single crystal Nd{sub}1.85Ce{sub}0.15CuO{sub}(4-δ) is theoretically analyzed within the framework of classical electron-phonon i.e., Bloch-Gruneisen model of resistivity. For the reason of inherent acoustic (low frequency) phonons (ω{sub}(ac)) as well as high-frequency optical phonons (ω{sub}(op)), the contributions to the resistivity were first derived. The optical phonons of the oxygen breathing mode yields a relatively larger contribution to the resistivity compared to the contribution of acoustic phonons. Estimated contribution to in-plane resistivity by considering both phonons, i.e., ω{sub}(ac) and ω{sub}(op), along with the zero-temperature-limited resistivity, when subtracted from single crystal data infers a quadratic temperature dependence over most of the temperature range [25 ≤ T ≤ 300]. Quadratic temperature dependence of ρ{sub}(diff.) = [ρ{sub}(exp.) - {ρ{sub}0 + ρ{sub}(e-ph)(=ρ{sub}(ac) + ρ{sub}(op))}] is understood in terms of 3D electron-electron inelastic scattering. The comparison of single crystal experimental data appears favorable with the present analysis.
机译：Nd {sub} 1.85Ce {sub} 0.15CuO {sub}（4-δ）单晶随温度变化的常态电阻率是在经典电子声子即Bloch-Gruneisen电阻率模型的框架内进行理论分析的。由于固有的声学（低频）声子（ω{sub}（ac））以及高频光学声子（ω{sub}（op））的原因，首先得出了对电阻率的贡献。与声学声子的贡献相比，氧气呼吸模式的光学声子对电阻率的贡献相对较大。从单晶数据中减去两个声子即ω{sub}（ac）和ω{sub}（op）以及零温度限制电阻率，估计的对平面内电阻率的贡献在大多数温度范围[25≤T≤300]上具有依赖性。 ρ{sub}（diff。）= [ρ{sub}（exp。）-{ρ{sub} 0 +ρ{sub}（e-ph）（=ρ{sub}（ac）+ρ} {sub}（op））}是根据3D电子-电子非弹性散射来理解的。单晶实验数据的比较似乎有利于本分析。

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