Nonphonon mechanism of high-temperature superconductivity in cuprates

Y. M. Malozovsky; Jiang-Di Fan

doi:10.1117/12.182692

10 August 1994 Nonphonon mechanism of high-temperature superconductivity in cuprates

Y. M. Malozovsky, Jiang-Di Fan

Proceedings Volume 2158, Oxide Superconductor Physics and Nano-Engineering; (1994) https://doi.org/10.1117/12.182692
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Superconductivity and metal-insulator phase transition in a layered 2D electron liquid, taking into account electron-electron correlation effects and spin density fluctuations, have been considered by means of the Fermi-liquid approach. It is shown that the electron-electron interaction mediated by the virtual charge density excitations in a layered 2D correlated Fermi liquid has the short-range attractive character at the intermediate electron density. It is found that such interaction leads to superconductivity at the intermediate density of carriers and the phase transition to the insulating state with the decrease of the density. The dependence of transition temperature T_c on the doping density, interlayer spacing and dielectric constant of the cuprate under investigation is also shown. A optimum T_c for a single-layer cuprate and the possibility to reach room temperature superconductivity are predicted as well. This indicates a direction to synthesize the compounds with superconductivity at higher temperature.

Citation Download Citation

Y. M. Malozovsky and Jiang-Di Fan "Nonphonon mechanism of high-temperature superconductivity in cuprates", Proc. SPIE 2158, Oxide Superconductor Physics and Nano-Engineering, (10 August 1994); https://doi.org/10.1117/12.182692

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