高T_c超导体中的低维库仑关联与负值库仑赝势

LOW-DIMENSIONAL COULOMB CORRELATIONS AND NEGATIVE COULOMB PSEUDOPOTENTIALS IN THE HIGH-Tc SUPERCONDUCTORS

电子—电子的强关联有可能导致负值库仑赝势,提出了准低维电子气的一种处理方案,用等离激元机制计算了不同维度下的库仑赝势。

In our opinion that strong electron-electron correlations may give rise to negative value of the Coulomb pseudopotential. In this paper, a scheme to treat quasi-lowdimensionai electron gases is proposed, Coulomb pseudopotentials in various dimensions are calculated within framework of the plasmon mechanism of superconductivity.