Volume 81, Number 5, March 2008
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||19 February 2008|
Doping dependence of the upper critical field in LaSrxCuO4 from specific heat
National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - P.O. Box 603, Beijing 100080, PRC
Corresponding author: email@example.com
Accepted: 15 January 2008
The low-temperature specific heat of LaSrxCuO4 (LSCO) single crystals in the magnetic field H up to 12 T has been examined over a wide range of doping (0.063p0.238). From this we have mapped the upper critical field of LSCO across the entire superconducting diagram. It is found that the shows a doping dependence similar to that of the critical temperature Tc. We have discussed the implications of the result and proposed that there may be an effective superconducting energy scale responsible for the behavior in the underdoped region.
PACS: 74.25.Bt – Thermodynamic properties / 74.25.Op – Mixed states, critical fields, and surface sheaths / 74.72.Dn – La-based cuprates
© EPLA, 2008
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