Measurements of Stationary Josephson Current between High-Tc Oxides as a Tool to Detect Charge Density Waves

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Stationary Josephson tunnel current Ic between superconductors with d-wave order parameter symmetry and charge-density-wave (CDW) partial gapping was analyzed in the two-dimensional model appropriate to high-Tc cuprates. It was shown that, in certain experimental setups, due to the peculiar overlap of superconducting and CDW gaps in the momentum space, the dependence of Ic on the CDW parameters may be strongly nonmonotonic. Hence, we suggested that Ic measurements in the wide range of dopings can serve as an indicator of CDW existence in the pseudogap regions of the cuprate phase diagrams. Besides, the orientation Ic-dependences were analyzed.