Anisotropic trigger electrical properties of two-dimensional superlattices

The problem of spontaneous generation of a transverse electric field in a two-dimensional superlattice with an additive spectrum when the pulling field changes is considered. It is shown that in the case the width of the minizone coincides in the longitudinal and transverse directions, when the pulling field reaches a certain threshold value, two equally probable states of the system arise, corresponding to the appearance of a transverse field of different signs, which leads to a fracture on the longitudinal volt-ampere characteristic. In case of deviation from the width equality of the minizone, one of these states becomes energetically more preferable, but with some impulse action the system can move to the second state, which leads to a jump-like change in the longitudinal current in the superlattice.