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arXiv 0905.2504cond-mat.supr-concond-mat.str-el
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100 K以上过掺杂$_2$ $_2$ CuO $_{6+δ}$的各向异性散射跟踪

Tracking anisotropic scattering in overdoped Tl$_2$Ba$_2$CuO$_{6+δ}$ above 100 K

M. M. J. French, J. G. Analytis, A. Carrington, L. Balicas, N. E. Hussey

摘要:

本文介绍了新的极角相关的磁电阻(ADMR)测量过掺杂的铜氧化物T1 $_2$ Ba $_2$ CuO $_{6+δ}$在扩大范围内的温度和方位角。这些详细的测量再次确认了在更有限的温度范围内和在一个单一的方位角取向,特别是描绘的平面内散射率到各向同性和各向异性组件的早期数据的分析。这些新的测量还揭示了散射率的温度和动量依赖性的额外特征,包括$T^2$组分中的各向异性以及高达100 K的$T$ -线性和$T^2$组分的保存。由此产生的形式的散射率的地方严格限制任何即将到来的理论框架的发展正常状态的高温超导铜酸盐的电荷响应。

英文摘要:

This article describes new polar angle-dependent magnetoresistance (ADMR) measurements in the overdoped cuprate Tl$_2$Ba$_2$CuO$_{6+δ}$ over an expanded range of temperatures and azimuthal angles. These detailed measurements re-affirm the analysis of earlier data taken over a more restricted temperature range and at a single azimuthal orientation, in particular the delineation of the intraplane scattering rate into isotropic and anisotropic components. These new measurements also reveal additional features in the temperature and momentum dependence of the scattering rate, including anisotropy in the $T^2$ component and the preservation of both the $T$-linear and $T^2$ components up to 100 K. The resultant form of the scattering rate places firm constraints on the development of any forthcoming theoretical framework for the normal state charge response of high temperature superconducting cuprates.

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