Publication

Magnetooptical Studies of Acceptors Confined in Gaas/Alxga1-Xas Quantum-Wells

Alfredo Pasquarello
1994
Journal Articles

Abstract

A magneto-optical study of accepters in varying degrees of confinement in GaAs/Al-x Ga-l-x, As quantum wells (QW's) is presented. A model for the splitting of the acceptor bound exciton (BE) and the allowed BE transitions in the presence of a magnetic field is presented. Our experimental results for the acceptor BE emission agree with calculated g values for bound holes, e.g., g(3/2) = 0. 61 and g(1/2) = 0.35 for a 150-Angstrom-wide QW. Furthermore, the energy separation between the acceptor m(j) = +/-3/2 1S(T-6) ground state and the excited m(j) = +/- 3/2 2S(T-6) state as a function of applied magnetic field is derived from selective photoluminescence and resonant-Raman-scattering measurements. Finally, these experimental results are compared with theoretical predictions for the confined acceptor states.

Official source

https://infoscience.epfl.ch/entities/publication/e9e8e8fa-869f-4d6e-8d1f-9b8ef4b2347a

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Alfredo Pasquarello
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e9e8e8fa-869f-4d6e-8d1f-9b8ef4b2347a

About this result

Related concepts (32)

Magnetic field

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets.

Electromagnetic field

An electromagnetic field (also EM field or EMF) is a classical (i.e. non-quantum) field produced by moving electric charges. It is the field described by classical electrodynamics (a classical field theory) and is the classical counterpart to the quantized electromagnetic field tensor in quantum electrodynamics (a quantum field theory). The electromagnetic field propagates at the speed of light (in fact, this field can be identified as light) and interacts with charges and currents.

Magnetic moment

In electromagnetism, the magnetic moment is the magnetic strength and orientation of a magnet or other object that produces a magnetic field. Examples of objects that have magnetic moments include loops of electric current (such as electromagnets), permanent magnets, elementary particles (such as electrons), composite particles (such as protons and neutrons), various molecules, and many astronomical objects (such as many planets, some moons, stars, etc).

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Magnetooptical Studies of Acceptors Confined in Gaas/Alxga1-Xas Quantum-Wells

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