T(c) suppression in co-doped striped cuprates.
We propose a model that explains the reduction of T(c) due to the pinning of stripes by planar impurity co-doping in cuprates. A geometrical argument about the planar fraction of carriers affected by stripe pinning leads to a linear T(c) suppression as a function of impurity concentration z. The critical value z(c) for the vanishing of superconductivity is shown to scale like T(2)(c) in the incompressible stripe regime and becomes universal in the compressible regime. Our theory agrees very well with the experimental data in single- and bilayer cuprates co-doped with Zn, Li, Co, etc.
Morais Smith
C
C
Institut de Physique Théorique, Pérolles, CH-1700 Fribourg, Switzerland.
Castro Neto
A H
AH
Balatsky
A V
AV