Impurity-induced Tc reduction in high-temperature superconductors
College of Science
Physical Review B - Condensed Matter and Materials Physics
We study the effects of nonmagnetic impurities substituted for Cu atoms on the superconducting transition temperature Tc in high-temperature cuprate superconductors, using the d-p model within the fluctuation exchange approximation and the coherent potential approximation. Tc near the optimum-doped region reduces more rapidly than that for the over-doped region. We show that the rapid reduction of Tc is due mainly to the damping of the quasiparticle in our formalism.
Digitial Object Identifier (DOI)
Matsunaka, D., Kasai, H., Diño, W., & Nakanishi, H. (2004). Impurity-induced Tc reduction in high-temperature superconductors. Physical Review B - Condensed Matter and Materials Physics, 70 (17), 1-5. https://doi.org/10.1103/PhysRevB.70.174504
Copper; Superconductors; High temperatures