Mesoscopic Two-Dimensional Electron Crystals in Single and Double Layers

Two - dimensional electron crystals in single and dou - ble layers

We present results of Monte-Carlo simulations for finite 2D single and bilayer systems. Strong Coulomb correlations lead to arrangement of particles in configurations resembling a crystal lattice. For binary layers, there exists a particularly rich variety of lattice symmetries which depend on the interlayer separation d. We demonstrate that in these mesoscopic lattices there exist two fundamen...

Ferromagnetic two-dimensional crystals: Single layers of K2CuF4

Infrared phototransistor using capacitively coupled two-dimensional electron gas layers

A narrow-band infrared phototransistor s14.8 mmd is designed and realized based on a GaAs/AlGaAs double-layer structure. An isolated island formed from the first quantum well sQWd works as a gate, which is capacitively coupled to the remote two-dimensional electron gas s2DEGd layer working as the source/drain channel. Incident radiation excites the intersubband transition within the isolated QW...

Coulomb drag between disordered two-dimensional electron-gas layers.

We derive and evaluate expressions for the frictional Coulomb drag between disordered two-dimensional electron gas layers. Our derivation is based on the memory-function formalism and the expression for the drag reduces to previously known results in the ballistic limit. We find that Coulomb drag is appreciably enhanced by disorder at low temperatures when the mean-free-path within a layer is c...

CyclotronResonance Study of the Two-Dimensional Electron Layers andDouble-Layers in TiltedMagnetic Fields

The far-infrared absorption in two-dimensional electron layers subject to magnetic field of general orientation was studied theoretically. The Kubo formula is employed to derive diagonal components of the magneto-conductivity tensor of two-dimensional electron single-layers and double-layers. The parabolic quantum well is used to model a simple single-layer system. Both single-layer and double-...