Nernst Effect in Electron-doped Pr 2−x Ce X Cuo 4
نویسندگان
چکیده
The Nernst effect of Pr 2−x Ce x CuO 4 (x=0.13, 0.15, and 0.17) has been measured on thin film samples between 5-120 K and 0-14 T. In comparison to recent measurements on hole-doped cuprates that showed an anomalously large Nernst effect above the resistive T c and H c2 [1–4], we find a normal Nernst effect above T c and H c2 for all dopings. The H c2 (T) determined from the Nernst effect shows a conventional behavior for all dopings. The energy gap determined from H c2 (0) decreases as the system goes from under-doping to over-doping. The contrasting behavior of the Nernst effect above T c in hole and electron-doped cuprates suggests that conventional superconducting fluctuations are the cause of the large signal in the hole-doped compounds.
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