Dominance of antinodal quasiparticles on the transport properties of heavily overdoped high-Tc Cuprates: Infrared-reflectance spectra

被引：0
作者：
Key Laboratory of Display Materials and Photoelectric Devices, Tianjin University of Technology, Ministry of Education, Tianjin 300384, China [1 ]
机构：
[1] Key Laboratory of Display Materials and Photoelectric Devices, Tianjin University of Technology, Ministry of Education
来源：
Chin. Phys. Lett. | 2009年 / 2卷
关键词：
Transport properties;
D O I：
10.1088/0256-307X/26/2/027401
中图分类号：
学科分类号：
摘要：
The infrared reflectance spectrum up to 2500 cm-1 for heavily overdoped Tl-2201 at 300 K has been analysed under the semiclassical approximation. In this approach, we use two independent sets of parameters to fit the reflectance: the momentum-dependent Fermi velocity νk and the momentum-dependent scattering rate τ-1 (κ). Unlike the case at optimal doping in which the transport properties are dominated by the nodal quasi-particles (QPs), both the lifetime and the Fermi velocity of the QPs in the antinodal region near the Fermi surface increase remarkably for the heavily overdoped samples. Our fitting results indicate that the antinodal QPs tend to dominate the transport properties in heavily overdoped high-Tc cupratesa. © 2009 Chinese Physical Society and IOP Publishing Ltd.
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