Polaronic features of dopant{induced charge carriers are manifest in recent experiments on La 2?x Sr x CuO 4+y and La 2?x Ni x CuO 4+y. To study the formation of hole (bi)polarons in such systems exhibiting strong Coulomb interactions, the Holstein{t{J model is examined by means of a variational diagonalization technique for a wide range of phonon frequencies and electron-phonon (EP) couplings ...

We have calculated the effect of the electron(hole)±confined LO-phonon interactions on the exci-ton binding energy in rectangular quantum-well wires (QWW) as a function of the length of one side of the wire for several values of the length of the other side. Our results indicate that the polaronic contribution to the binding increases as the confinement length increases.