Microwave Generation in Synchronized Semiconductor Superlattices

Multistability, chaos, and random signal generation in semiconductor superlattices.

Historically, semiconductor superlattices, artificial periodic structures of different semiconductor materials, were invented with the purpose of engineering or manipulating the electronic properties of semiconductor devices. A key application lies in generating radiation sources, amplifiers, and detectors in the "unusual" spectral range of subterahertz and terahertz (0.1-10 THz), which cannot ...

Electron Transport in Semiconductor Superlattices

In this paper, we rigorously derive a diffusion model for semiconductor superlattices, starting from a kinetic description of electron transport at the microscopic scale. Electron transport in the superlattice is modelled by a collisionless Boltzmann equation subject to a periodic array of localized scatters modeling the periodic heterogeneities of the material. The limit of a large number of p...

Spin instabilities in semiconductor superlattices

The subband levels of quantum wells grown in a periodic array form minibands whose bandwidth D depends on the probability of interlayer tunneling. In the presence of a strong magnetic field, this system of minibands can exhibit various Coulomb-interaction-driven spin polarization instabilities at an integral value of the filling factor n . We investigate in particular the Hartree-Fock phase dia...

Dissipative chaos in semiconductor superlattices.

Kirill N. Alekseev, Gennady P. Berman, David K. Campbell Ethan H. Cannon, and Matthew C. Cargo aCenter for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory Los Alamos, New Mexico 87545, U.S.A. bKirensky Institute of Physics, 660036, Krasnoyarsk, Russia cDepartment of Physics, University of Illinois at Urbana-Champaign, 1110 West Green St., Urbana, IL 61801-3080, U.S.A....

Semiconductor superlattices with periodic disorder