Condensed Matter Physics Seminar

Thursday, February 17, 2000, 2 p.m.
Plant Sciences Building, Room 1130

Optical properties of  two-dimensional electron gas in II-VI quantum well structures

Grzegorz Karczewski

(Institute of Physics, Polish Academy of Sciences, Warsaw, Poland)

Abstract:  Optical properties of two-dimensional electron gas (2DEG) confined in modulation doped Cd(Mn)Te-based quantum wells will be discussed. Specifically, the talk will be focused on two aspects:
- the evolution of optical spectra of 2DEG with the sheet density of electrons,
- the effect of electron-Mn ion exchange interaction on the negatively charged exciton complexes X- (trions) and evolution of the combined exciton-cyclotron resonance  (ExCR) in high magnetic fields.
In the introductory part of the seminar, some details of the MBE growth of investigated structures (containing a step-like donor doping profile or a step-like manganese content) will be shown and discussed. This kind of structures has been designed and grown especially for the study.

Host: Bob Anderson

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