Electron-phonon pairing mechanism: cuprates with high value of the critical temperature

Abstract

The model for the cuprates based on the modified electron-phonon pairing mechanism has been tested. For this purpose, the superconductors with high value of the critical temperature have been taken into consideration. In particular: $\mathrm{YB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{7-\mathrm{y}}$, $\mathrm{HgB}{\mathrm{a}}_2\mathrm{Cu}{\mathrm{O}}_{4+\mathrm{y}}$, $\mathrm{HgB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_{1-\mathrm{x}}\mathrm{Z}{\mathrm{n}}_{\mathrm{x}}{\mathrm{O}}_{4+\mathrm{y}}$, and $\mathrm{HgB}{\mathrm{a}}_2\mathrm{C}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{8+\mathrm{y}}$. It has been shown that the dependence of the ratio $R_1\equiv 2{\Delta }_{tot}^{(0)}/k_B{T}_C$ on the doping ($p$) can be properly predicted in the framework of the presented theory; the symbol ${\Delta }_{tot}^{(0)}$ denotes the energy gap amplitude at the temperature of zero Kelvin, and $T_C$ is the critical temperature. The numerical results have been supplemented by the formula which describes the function $R_1(p)$.

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References in corpus (4)

• Crossover from weak to strong pairing in unconventional superconductors
• The nodal gap component as a good candidate for the superconducting order parameter in cuprates
• Spin Dynamics in Cuprates: Optical Conductivity of HgBa2CuO4
• Scaling analysis of normal state properties of high-temperature superconductors

Cited by in corpus (4)

• The high-pressure superconductivity in SiH4: the strong-coupling approach
• Anisotropic evolution of energy gap in Bi2212 superconductor
• Pseudogap in Eliashberg approach based on electron-phonon and electron-electron-phonon interaction
• Non-BCS temperature dependence of energy gap in thin film electron-doped cuprates