Condensed Matter Physics Seminar

Thursday, October 29, 1998, 3 p.m.
Physics Building, Room 1402

Magneto-optical study of low-dimensional excitons in semiconductors in high magnetic fields

Noboru Miura

(Institute for Solid State Physics, University of Tokyo, Japan)

Abstract: We present the recent results of the magneto-optical spectroscopy of low dimensional excitons in quantum wells (QWs), short period superlattices (SLs), quantum wires (QWRs) and quantum dots (QDs) in pulsed high magnetic fields produced by three different techniques, electromagnetic flux compression (up to 500T), the single-turn coil technique (up to 200T) and nondestructive long pulse magnets (up to 50T). Many different kinds of anomalous behaviors and unusual magnetic field effects were observed in very high magnetic fields. The topics to be discussed are: the exciton spectra in GaAs/AlAs QWs under ultrahigh magnetic fields up to 450T, anomalous magnetic field effect in GaP/AlP short period SLs, anomalies in the diamagnetic shift and the splitting of exciton lines in CdTe/CdMgTe QWs in the fractional quantum Hall regime, and the diamagnetic shift and the coupling of QWRs and QDs.

Host: Bob Anderson

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