Energy behavior with magnetic field of negatively charged magnetoexcitons in quantum wells and heterojunctions
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AbstractWe 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.
1997 ◽
Vol 11
(09)
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pp. 1195-1207
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2004 ◽
Vol 18
(27n29)
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pp. 3813-3816
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2002 ◽
Vol 16
(20n22)
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pp. 3216-3219
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2009 ◽
Vol 23
(12n13)
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pp. 2718-2722
2002 ◽
Vol 16
(20n22)
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pp. 3355-3359
1999 ◽
Vol 70
(1)
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pp. 237-239
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