Quadratic density response function of a two dimensional electron gas

Hartree-Fock energy of a density wave in a spin polarized two-dimensional electron gas

We calculate the Hartree-Fock energy of a density-wave in a spin polarized twodimensional electron gas using a short-range repulsive interaction. We find that the stable ground state for a short-range potential is always either the paramagnetic state or the uniform ferromagnetic state. The energy of a density-wave state is, however, reduced by a factor proportional to (1 − ζ), where ζ is the po...

Deep Tail in the Density of States of a Disordered Two-Dimensional Electron Gas

A theory is given of the density of states (DOS) in the low-energy tail for the disordered twodimensional electron gas (2D EG) in a semiconductor heterostructure subjected to Gaussian random fields of any origin (especially of short range). The calculation is carried out by means of a path-integral technique within the approximation based on a non-local harmonic modelled action and that of the ...

Density of states between Landau levels in a two-dimensional electron gas.

Two-dimensional electron systems (2D ES}in a perpendicular magnetic field B display fascinating quantum oscillations. ' Examples of 2D ES's are electrons confined to interfaces in GaAs-Ga& „Al„As layered heterostructures and electrons at surfaces in Si metal-oxidesemiconductor field-effect transistors (MOSFET's). Earliest interest was in electron transport properties, the integer quantum hall e...

Two-dimensional electron gas near full polarization

We establish the consistency of the Fermi liquid description and find a relation between the Fermi liquid constants for a two-dimensional electron system near the point of full polarization due to a parallel magnetic field H. Our results enable us to predict connections between different thermodynamic properties of the system. In particular, we find that near the point of full polarization Hc ,...

Two dimensional electron gas at oxide interfaces