We find in the Bi2Sr2CaCu2O8+δ system that the characteristic temperatures TX* [below which the uniform susceptibilities Xab(T) (H⊥c) and Xc(T) (H || c) decrease] and T*pc [below which the out-of-plane resistivity pc(T) shows typical upturn] coincide for all doping levels. We attribute the T dependence of X's and pc to the anomalous (pseudogapped) density of states (DOS) in high-Tc cuprates. Furthermore, the anisotropy in the T dependence of X's is universal, i.e., Xc ∝ 1.6Xab, showing that there is only a single T-dependent component in the X's. This implies that the Curie-like behavior (dX/dT < 0) observed in overdoped samples is also caused by a DOS effect.
|Number of pages||4|
|Journal||Physical Review Letters|
|Publication status||Published - 2000 Jun 19|
ASJC Scopus subject areas
- Physics and Astronomy(all)