On the theory of high-T_c superconductivity of doped cuprates

Abstract

A theoretical analysis is presented on possible effects of disorder by dopants in high-temperature superconducting cuprate perovskites, to define their basic spectra of spin and electronic excitations, and the subsequent observable properties, especially doping dependence of superconducting order parameter. The central point in the proposed physical picture is formation of specific impurity subband within the insulating bandgap of initial undoped material, serving as a source for the system metallization and further transition into superconducting state with anisotropic order parameter.

Kernel polynomial method to Anderson transition in disordered β-graphyne

“…), topological defects (vacancies, edge disorder, etc. ), ripples or ad-atoms [20][21][22][23][24]. For graphene, as the quality of samples is improving and synthesis techniques are developing, the dominant disorder varies from bulk disorder to edge defects.…”