Publication

Anderson and Stark localization in GaAs/(AlGa)As disordered superlattices

Jean-Louis Staehli, Denis Martin
1998
Journal Articles

Abstract

Differences and analogies between disorder-induced localization and electric-field-induced localization are discussed. Calculations using a tight binding model and transfer matrix method for disordered superlattices are reported. Our results indicate the existence of residual structures in the energy spectrum of the disordered superlattices, which are absent in the Stark localization case. The residual structure in the Anderson localization case can be interpreted as arising from the presence of the neighboring of quantum wells with the same width and energy levels. (C) 1998 Academic Press Limited.

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https://infoscience.epfl.ch/entities/publication/ab54b348-99b0-4541-8948-0f6860e07379

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Jean-Louis Staehli, Denis Martin
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ab54b348-99b0-4541-8948-0f6860e07379

About this result

Related concepts (29)

Energy level

A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy, called energy levels. This contrasts with classical particles, which can have any amount of energy. The term is commonly used for the energy levels of the electrons in atoms, ions, or molecules, which are bound by the electric field of the nucleus, but can also refer to energy levels of nuclei or vibrational or rotational energy levels in molecules.

Quantum well

A quantum well is a potential well with only discrete energy values. The classic model used to demonstrate a quantum well is to confine particles, which were initially free to move in three dimensions, to two dimensions, by forcing them to occupy a planar region. The effects of quantum confinement take place when the quantum well thickness becomes comparable to the de Broglie wavelength of the carriers (generally electrons and holes), leading to energy levels called "energy subbands", i.e.

Fermi level

The Fermi level of a solid-state body is the thermodynamic work required to add one electron to the body. It is a thermodynamic quantity usually denoted by μ or EF for brevity. The Fermi level does not include the work required to remove the electron from wherever it came from. A precise understanding of the Fermi level—how it relates to electronic band structure in determining electronic properties; how it relates to the voltage and flow of charge in an electronic circuit—is essential to an understanding of solid-state physics.

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