Experimental investigation of the origin of the cross-over temperature in the cuprates

Details Experimental investigation of the origin of the cross-over temperature in the cuprates Experimental investigation of the origin of the cross-over temperature in the cuprates

2008-08-04

arxiv.org/abs/0808.0238v1

Phys. Rev. B 78, 020505(R) (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.020505

We investigate the cross-over temperature T* as a function of doping in (Ca_{x}La_{1-x})(Ba_{1.75-x}La_{0.25+x})Cu_3O_{y}, where the maximum Tc (Tc^max) varies continuously by 30% between families (x) with minimal structural changes. T* is determined by DC-susceptibility measurements. We find that T* scales with the maximum Neel temperature TN^max of each family. This result strongly supports a magnetic origin of T*, and indicates that three dimensional interactions play a role in its magnitude.

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