Relation between charge order and Nernst effect

通过控制条带的强度，精确测量了掺钕La_xLt；2-x&Gt；SrxCuO4单晶的能斯特效应。我们发现，尽管掺钕，能斯特信号开始增加的起始温度T并没有明显的变化。另一方面，在低温下，能斯特信号的绝对值根据条纹顺序的强度被强烈抑制。这些结果表明，(电荷)条序的涨落在高温下增强了T_起始以下的能斯特信号，而在低温下，掺钕增强的条序抑制了超导涨落，从而降低了能斯特信号。我们还观察到了能斯特信号在电荷序温度T_ch以下的增加，这是在衍射测量中观察到的。

e have precisely measured the Nernst effect in Nd-doped La_<2-x> Sr_xCuO_4 single crystals with controlling the strength of the stripe order. We found that the onset temperature T_onset, 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 T_onset 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 T_ch which is observed in diffraction measurement.