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Energy behavior with magnetic field of negatively charged magnetoexcitons in quantum wells and heterojunctions

Published online by Cambridge University Press:  10 February 2011

F. M. Munteanu ,
Y. Kim ,
C. H. Perry ,
D. G. Rickel ,
J. A. Simmons  and
J. L. Reno
F. M. Munteanu
Affiliation:
N.H.M.F.L., Los Alamos National Laboratory, Los Alamos, NM 87545 Dept. of Physics, Northeastern University, Boston, MA 02115
Y. Kim
Affiliation:
N.H.M.F.L., Los Alamos National Laboratory, Los Alamos, NM 87545
C. H. Perry
Affiliation:
Dept. of Physics, Northeastern University, Boston, MA 02115
D. G. Rickel
Affiliation:
N.H.M.F.L., Los Alamos National Laboratory, Los Alamos, NM 87545
J. A. Simmons
Affiliation:
Sandia National Laboratory, Albuquerque, NM 87185
J. L. Reno
Affiliation:
Sandia National Laboratory, Albuquerque, NM 87185
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Abstract

We present the results of the magneto-photoluminescence measurements performed on modulation doped GaAs/AlGaAs heterostructures in high magnetic fields (up to 60T) and low temperatures (0.37−1.5K). With increasing magnetic field we observe the formation of the triplet and singlet states of negatively charged magneto-excitons (X−) in addition to the neutral exciton (X0). Their behavior with field strongly depends on the sample geometry. In the case of a modulation doped quantum well (QW) with a well-width of 200A, the and states cross at a magnetic field of about 40T, whereas for a modulation-doped single heterojunction (SHJ) these states show no crossing over the whole range of available fields.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 588: Symposium P – Optical Microstructural Characterization of Semiconductors , 1999 , 321
Copyright
Copyright © Materials Research Society 2000

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