Abstract
We have precisely measured the Nernst effect in Nd-doped La2-xSrxCuO4 single crystals with controlling the strength (stability) of the stripe order. We found that the onset temperature Tonset, where the Nernst signal starts increasing, does not change conspicuously in spite of Nd-doping. At low temperatures, on the other hand, the absolute value of the Nernst signal is strongly suppressed in accordance with the strength of the stripe order. These results imply that the fluctuation of (charge) stripe order enhances the Nernst signal below Tonset at high temperatures, and then the stripe order enhanced by Nd-doping suppresses the superconducting fluctuation to reduce the Nernst signal at low temperatures. We also observed an increase of the Nernst signal below the charge order temperature Tch which has been observed in diffraction measurement.
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