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
Back to Condensed Matter Physics Seminar Home
Page
http://www2.physics.umd.edu/~yakovenk/seminar/