Browsing by Autor "E. Yu. Beliayev"

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Coalescence of Impurity Strontium Atoms in Lightly-Substituted Samples of Lanthanum Cuprate
(Cornell University, 2022) E. Yu. Beliayev; Dianela Osorio; Pedro Contreras
By comparing experimental results obtained in the study of the electron transport and magnetic properties of samples of lightly strontium-substituted lanthanum cuprates and the results of a previously published numerical analysis in the reduced elastic scattering space (RPS) of the elastic scattering cross-section, we construct a phenomenological classical self-consistent strong-binding energy density profile in the superconducting $La_{2-x}Sr_xCuO_4$ cuprate. It is found that the imaginary part of the reduced phase scattering space can be zero, almost constant, or strongly self-consistent, depending on the Sr substituted concentration. If the Sr atomic concentration is dilute, a constant imaginary part of the elastic scattering cross-section brings a sub-melted coalescent superconducting metallic profile similar to the one with a constant scattering lifetime in the metallic state of normal metals, except for the unitary narrow, sharp peak at zero frequency. A self-consistent broadening of this peak occurs for a higher concentration of Sr atoms, and finally, for very small amounts of nonmagnetic dirt, only the narrow unitary peak prevails around the zero frequency.
Evidence for coalescence in lightly doped strontium-substituted lanthanum cuprate samples
(Centre National de la Recherche Scientifique, 2022) E. Yu. Beliayev; Dianela Osorio; P. Contreras
By comparing the experimental results obtained in the study of the electron transport and magnetic properties of samples of lightly doped strontium substituted lanthanum cuprates and the results of the theoretical analysis in the reduced elastic scattering space (RPS), we constructed the classical self-consistent strong-binding energy density profile in the superconducting mode for this material. It is found that the imaginary part of the RPS can be zero, almost constant, or strongly self-consistent, depending on the Sr impurity concentration x. Supposing the Sr impurity concentration is very dilute, a constant imaginary part of the elastic scattering cross-section brings a sub-melted coalescent superconducting metallic state similar to the constant lifetime in the normal state, except for the unitary narrow, sharp peak at zero frequency. A broadening of the peak occurs for optimal concentration of Sr atoms, mixing a more significant amount of nodal fermion quasiparticles with Cooper pairs and making the energy density profile strongly self-consistent dependent.