Volume 63, Number 4, August 2003
|Page(s)||583 - 589|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Two-dimensional feature of the Nernst effect in normal state of underdoped x single crystals
National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences P.O. Box 603, Beijing 100080, PRC
2 Physics Department, Zhejiang University - Zhejiang, PRC
3 Center for Advanced Study, Tsinghua University - Beijing 100084, PRC
Accepted: 18 June 2003
The Nernst effect has been measured for an underdoped and an optimally doped x single crystal with the magnetic field applied along different directions. For both samples, when , a significant Nernst voltage appears above and keeps measurable up to a high temperature (100). However, when -plane the Nernst signal along the c-axis drops below the noise level quickly above for the underdoped sample. Moreover, the in-plane Nernst data with field at different angles shows a nice scaling behavior with the c-axis component of the field. All these give a strong indication for a 2D feature of the Nernst signal in the normal state of underdoped cuprate superconductors.
PACS: 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.) / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.72.Dn – -based cuprates
© EDP Sciences, 2003
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