On the role of electron-phonon interaction in the resistance anisotropy of two-dimensional electrons in GaAs heterostructures

摘要

A contribution of the electron-phonon interaction into the energy of aunidirectional charge ordered state (stripe phase) of two-dimensional electronsin GaAs heterostructures is analyzed. The dependence of the energy on thedirection of the electron density modulation is calculated. It is shown that inelectrons layers situated close to the (001) surface the interference betweenthe piezoelectric and the deformation potential interaction causes apreferential orientation of the stripes along the [110] axis.