Effect of Impurity Scattering on the Nonlinear Microwave Response in High-Tc Superconductors

Details Effect of Impurity Scattering on the Nonlinear Microwave Response in High-Tc Superconductors Effect of Impurity Scattering on the Nonlinear Microwave Response in High-Tc Superconductors

2007-10-04

arxiv.org/abs/0710.0934v1

J. Phys. Soc. Jpn. 76 (2007) 073703

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1143/JPSJ.76.073703

We theoretically investigate intermodulation distortion in high-Tc superconductors. We study the effect of nonmagnetic impurities on the real and imaginary parts of nonlinear conductivity. The nonlinear conductivity is proportional to the inverse of temperature owing to the dependence of the damping effect on energy, which arises from the phase shift deviating from the unitary limit. It is shown that the final-states interaction makes the real part predominant over the imaginary part. These effects have not been included in previous theories based on the two-fluid model, enabling a consistent explanation for the experiments with the rf and dc fields.

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