| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Dominance of Antinodal Quasiparticles on the Transport Properties of Heavily Overdoped High-Tc Cuprates: Infrared-Reflectance Spectra |
| MA Yong-Chang, ZHAO Jie, AN Yu-Kai, LIU Ji-Wen |
| Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education), School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384 |
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| Cite this article: |
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MA Yong-Chang, ZHAO Jie, AN Yu-Kai et al 2009 Chin. Phys. Lett. 26 027401 |
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Abstract The infrared reflectance spectrum up to 2500cm-1 for heavily overdoped Tl-2201 at 300K 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 vk and the momentum-dependent scattering rateτ-1(εk). 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 cuprates.
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| Keywords:
74.72.Jt
74.25.Gz
74.25.Jb
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Received: 20 October 2008
Published: 20 January 2009
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