Momentum anisotropy of the scattering rate in cuprate superconductors
Momentum anisotropy of the scattering rate in cuprate superconductors
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DOI：
10.1103/physrevb.71.014517
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发表时间：
2004-04
影响因子：
3.7
通讯作者：
A. Kaminski;H. Fretwell;H. Fretwell;M. Norman;M. Randeria;S. Rosenkranz;U. Chatterjee;U. Chatterjee;J. Campuzano;J. Campuzano;J. Mésot;Takafumi Sato;Takashi Takahashi;T. Terashima;M. Takano;K. Kadowaki;Z. Li;H. Raffy
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文献类型：
--
作者：
A. Kaminski;H. Fretwell;H. Fretwell;M. Norman;M. Randeria;S. Rosenkranz;U. Chatterjee;U. Chatterjee;J. Campuzano;J. Campuzano;J. Mésot;Takafumi Sato;Takashi Takahashi;T. Terashima;M. Takano;K. Kadowaki;Z. Li;H. Raffy
我们使用角分辨光电子能谱研究了高温铜氧化物超导体散射率的动量和能量依赖性。对于欠掺杂和最佳掺杂，费米表面周围的散射率为形式$a+B\ensuremath{\omega}$。非弹性系数B为各向同性。然而，弹性项$a$，被发现是高度各向异性下和最佳掺杂的样品，与各向异性相关的赝隙。这与重掺杂的样品形成对比，重掺杂的样品显示各向同性的散射率并且不存在高于${T}_{c}$的赝能隙。我们发现这是一个通用的属性为单层和双层化合物。
We examine the momentum and energy dependence of the scattering rate of the high-temperature cuprate superconductors using angle-resolved photoemission spectroscopy. The scattering rate is of the form $a+b\ensuremath{\omega}$ around the Fermi surface for under-and optimal doping. The inelastic coefficient $b$ is found to be isotropic. The elastic term $a$, however, is found to be highly anisotropic for under-and optimally doped samples, with an anisotropy which correlates with that of the pseudogap. This is contrasted with heavily overdoped samples, which show an isotropic scattering rate and an absence of the pseudogap above ${T}_{c}$. We find this to be a generic property for both single-and double-layer compounds.