Physics – Condensed Matter – Superconductivity
Scientific paper
2009-02-06
Phys. Rev. B 79, 214504 (2009)
Physics
Condensed Matter
Superconductivity
9 pages, 10 figures
Scientific paper
10.1103/PhysRevB.79.214504
We present reversible magnetization data of a high quality Bi2212 single crystal and explore the occurrence of 3D-xy critical behavior close to the bulk transition temperature Tc and of Kosterlitz-Thouless (KT) behavior. Below and above the presumed Kosterlitz-Thouless transition temperature T_KT we observe the characteristic 2D-xy behavior: a downward shift of the crossing point phenomenon towards T_KT as the field is decreased and sufficiently below T_KT the characteristic 2D-xy relationship between the magnetization an the in-plane magnetic penetration depth. In contrast, the measured temperature dependence of the superfluid density does not exhibit the characteristic KT-behavior around the presumed T_KT. The absence of this feature is traced back to the 2D- to 3D-xy crossover setting in around and above T_KT. Invoking the Maxwell relation the anomalous field dependence of the specific heat peak is also traced back to the intermediate 2D-xy behavior. However, close to Tc we observe consistency with 3D-xy critical behavior, in agreement with measurements of the in-plane magnetic penetration depth.
Giannini Enrico
Schneider Tapio
Weyeneth S.
No associations
LandOfFree
Evidence for Kosterlitz-Thouless and 3D-xy critical behavior in Bi2212 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evidence for Kosterlitz-Thouless and 3D-xy critical behavior in Bi2212, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for Kosterlitz-Thouless and 3D-xy critical behavior in Bi2212 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-251749