On the origin of the transversal current in double layered heterostructures

It is shown that usually used theoretical model for double layered heterostructures as a pseudospin ferromagnet, does not give the observed two dimensional spectrum. Its existence is possible only neglecting Coulomb interaction destroying two dimensional structures and can be realized only in a strong magnetic field. That is connected also with the plain vortex lattices arising at strong magnetic field due to thermodynamic instability. This model gives the reasonable explanations of various observed effects depending on the filling of the corresponding bands.In particular in this work we show that in double layered heterostructures can exist large inter layer conductance really observed.