Local polarization, electron stripe, and high-T-c superconductivity in layered cuprates

We examine the possibility of high-T-c superconductivity mediated by the el ementary excitation of an electron stripe which is realized by neutralizing local polarization mainly caused by the c-displacement of ions on the CuO2 plane. Under the translation invariance of the electronic state of the neu tralization charges, it is found that both itinerant and localized electron s and/or holes can coexist in the stripe phase. If the frequency of the loc alized charge oscillation tends to soften along the stripe direction, super conductivity with T-c around 100 K can be realized, due to the enhancement of the coupling constant.