Z. Stegen, Su Jung Han, Jie Wu, Genda Gu, Qiang Li, J. H. Park, G. S. Boebinger, J. M. Tranquada
We present measurements of the resistivity parallel and perpendicular to the CuO(2) layers in single crystals of La(2-x)Ba(x)CuO(4) (LBCO) with x=0.095 as a function of perpendicular magnetic fields up to 35 T. At temperatures below the zero-field superconducting transition of 31.5 K, there is a regime of field strength for which superconducting phase coherence between the layers is destroyed, yet effective coherence is retained within the layers. Evidence that this is an actual state of matter is provided by a well-defined loss of order, indicated by the field dependence of the in-plane resistivity. The behavior of this phase is qualitatively identical to that observed previously for LBCO with x=1/8 in zero field, in which frustration of the interlayer Josephson coupling is associated with spin and charge stripe order.
View original:
http://arxiv.org/abs/1207.0528
No comments:
Post a Comment