J. Phys. IV France 09 (1999) Pr10-321-Pr10-323
About formation of electron stringsF.V. Kusmartsev
School of MAP, Loughborough University, U.K. and Landau Institute, Moscow, Russia
With the use of Hartree-Fock method we find that in narrow band solids there may arise an electron phase separation. These electron regions are spontaneously self-organized into the form of linear electron strings or droplets. The many-body self-trapping effect is due to a deformational electron-phonon interaction. A single string in a narrow band solid consists of a continuos chain of atoms which have trapped electrons (holes) due to the self-creation of a deformation well around this chain. We find that the length of such strings depends on the constant of deformation potential, the elastic modulus of the crystal and the inter-site Coulomb interaction between the particles.
© EDP Sciences 1999