Inhomogeneous Superconducting State and intrinsic Tc : Near Room   Temperature Superconductivity in the Cuprates
  Doped cuprates are inhomogeneous superconductors. The concept of an intrinsic critical temperature, Tcintr.$\equiv$ Tc*, whose value greatly exceeds that for the resistive Tcres.$\equiv$ Tc, is supported by a number of experimental studies, including those performed recently. These data are discussed in this review. The anomalous diamagnetism observed at Tcres.$\equiv$ <T< Tc* is a manifestation of the presence of superconducting clusters embedded into a normal metallic matrix. The value of intrinsic critical temperature in some cuprates reaches a value which is close to room temperature. The a.c. properties of such inhomogeneous systems are discussed. 
Vladimir Z. Kresin (1) and Stuart A. Wolf (2) ((1) Lawrence Berkeley   National Laboratory, University of California at Berk...
cond-mat.supr-con