| Issue |
Europhys. Lett.
Volume 63, Number 4, August 2003
|
|
|---|---|---|
| Page(s) | 583 - 589 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00569-0 | |
| Published online | 01 November 2003 | |
Two-dimensional feature of the Nernst effect
in normal state of underdoped
x
single crystals
1
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
Received:
14
March
2003
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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