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1995
Journal Article
Titel
Interaction coupled cyclotron transitions of two-dimensional electron systems in GaAs at high temperatures
Alternative
Wechselwirkungsgekoppelte Zyklotron-Übergäng eines zweidimensionalen Elektronengas Systems in GaAs bei hohen Temperaturen
Abstract
We report here the first observation of the cyclotron resonance Landau splitting for low density electron inversion layers in Alx Ga1-x As-GaAs heterojunctions. Even at temperatures close to 100 K electron-electron interactions couple the electrical dipole transitions from the ground and first excited Landau levels, with a coupling strength comparable to the one found at liquid helium temperatures. The experiment can be explained only in a single-particle approximation at sufficiently low densities and/or magnetic field strengths where the resonant polaron effect is important.
Author(s)