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In this study, the charge dynamics of the high temperature cuprate superconductor YBa\(_2\)(Cu\(_{1-x}\)Zn\(_x\))\(_3\)O\(_y\) over the electronic phase diagram have been investigated in a very wide doping range, as well as, for several Zn-contents, both in the normal and the superconducting state. The temperature dependent reflectivity measurements have been performed with Fourier transform infrared spectroscopy over a wide energy range. The optical conductivity spectra have been calculated from the reflectivity by using the Kramers-Krönig transformation. Detailed spectral weight analysis is performed on the optical conductivity spectra, especially in the pseudogap region. Several issues regarding to the electronic phase diagram were discussed. As a result, we obtained several important conclusions. Firstly, the behavior of the pseudogap in the superconducting state, secondly, the behavior of a precursor of superconductivity, and finally, some remarks related to the kinetic energy driven superconductivity were summarized below.


Optical Conductivity Precursor State Superfluid Density Superconducting Region Optical Conductivity Spectrum 
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© Springer Japan 2015

Authors and Affiliations

  1. 1.Experimental Physics IIAugsburg UniversityAugsburgGermany

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