Temperature–carrier-concentration phase diagram of a two-dimensional doped d-wave superconductor

摘要

The finite-temperature properties of a two-dimensional d-wave superconductor with theudLifshitz disorder, introduced by dopants, are studied. The doping dependence of the mean-fieldudcritical temperature TcudMF and of the superconducting critical temperature Tc defined by theudBerezinskii—Kosterlitz—Thouless transition are calculated at different values of coupling, dopantudpotential, and intermediate boson energy. It is shown that superconductivity tends to disappearudwith increasing doping when the dopant potential is large enough, though the metallic propertiesudof the system are preserved.