Origin of the oscillator strength of the triplet state of a trion in a magnetic field

被引：24

作者：

Sanvitto, D

Whittaker, DM

Shields, AJ

Simmons, MY

Ritchie, DA

Pepper, M

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Toshiba Res Europe Ltd, Cambridge Res Lab, Cambridge CB4 0WE, England

[3] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7HF, S Yorkshire, England

[4] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.89.246805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamics of the spin-triplet trion state, under high magnetic field in a GaAs/AlGaAs quantum well, are studied using time resolved spectroscopy. The oscillator strength of the triplet transition is shown to rise with increasing electron density, in good agreement with a theoretical model where the trion interacts with excess electrons in the quantum well. This analysis suggests that the spin-triplet trion state, which is expected to be an optically "dark" state, is experimentally observable due to the interactions with the excess electrons, demonstrating that X- cannot be regarded as an isolated three particle complex.

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页码：246805 / 246805

页数：4

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共 23 条

[1] Charged magnetoexcitons in two-dimensions: Magnetic translations and families of dark states [J].

Dzyubenko, AB ;

Sivachenko, AY .

PHYSICAL REVIEW LETTERS, 2000, 84 (19) :4429-4432

[2] Photoluminescence and radiative lifetime of trions in GaAs quantum wells [J].

Esser, A ;

Runge, E ;

Zimmermann, R ;

Langbein, W .

PHYSICAL REVIEW B, 2000, 62 (12) :8232-8239

[3] Negatively and positively charged excitons in GaAs/AlxGa1-xAs quantum wells [J].

Finkelstein, G ;

Shtrikman, H ;

BarJoseph, I .

PHYSICAL REVIEW B, 1996, 53 (04) :R1709-R1712

[4] Charged exciton dynamics in GaAs quantum wells [J].

Finkelstein, G ;

Umansky, V ;

Bar-Joseph, I ;

Ciulin, V ;

Haacke, S ;

Ganiere, JD ;

Deveaud, B .

PHYSICAL REVIEW B, 1998, 58 (19) :12637-12640

[5] Charged and neutral exciton phase formation in the magnetically quantized two-dimensional electron gas [J].

Gekhtman, D ;

Cohen, E ;

Ron, A ;

Pfeiffer, LN .

PHYSICAL REVIEW B, 1996, 54 (15) :10320-10323

[6] Comparative study of the negatively and positively charged excitons in GaAs quantum wells [J].

Glasberg, S ;

Finkelstein, G ;

Shtrikman, H ;

Bar-Joseph, I .

PHYSICAL REVIEW B, 1999, 59 (16) :10425-10428

[7] Photoluminescence of negatively charged excitons in high magnetic fields [J].

Hayne, M ;

Jones, CL ;

Bogaerts, R ;

Riva, C ;

Usher, A ;

Peeters, FM ;

Herlach, F ;

Moshchalkov, VV ;

Henini, M .

PHYSICAL REVIEW B, 1999, 59 (04) :2927-2931

[8] Carrier dynamics and recombination processes of charged excitons in a GaAs/AlGaAs quantum well [J].

Hogg, RA ;

Sanvitto, D ;

Shields, AJ ;

Simmons, MY ;

Ritchie, DA ;

Pepper, M .

PHYSICA B, 1999, 272 (1-4) :412-415

[9] OBSERVATION OF NEGATIVELY CHARGED EXCITONS X- IN SEMICONDUCTOR QUANTUM-WELLS [J].

KHENG, K ;

COX, RT ;

DAUBIGNE, YM ;

BASSANI, F ;

SAMINADAYAR, K ;

TATARENKO, S .

PHYSICAL REVIEW LETTERS, 1993, 71 (11) :1752-1755

[10] Photoluminescence and reflectance studies of negatively charged excitons in GaAs/Al0.3Ga0.7As quantum-well structures [J].

Kioseoglou, G ;

Cheong, HD ;

Nickel, HA ;

Petrou, A ;

McCombe, BD ;

Schaff, W .

PHYSICAL REVIEW B, 2000, 61 (07) :4780-4785