On the origin of the transversal current in double layered heterostructures

TL;DR

This paper critiques the pseudospin ferromagnet model for double layered heterostructures, showing it only explains certain phenomena under strong magnetic fields and Coulomb interaction neglect, and discusses the existence of large interlayer conductance.

Contribution

It demonstrates the limitations of the pseudospin ferromagnet model and explores conditions under which large interlayer conductance can occur in heterostructures.

Findings

The pseudospin ferromagnet model does not produce the observed 2D spectrum without neglecting Coulomb interactions.

Large interlayer conductance can exist in double layered heterostructures under certain conditions.

Strong magnetic fields induce vortex lattices affecting the electronic properties.

Abstract

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.