Observation of magnetically induced effective-mass enhancement of quasi-2D excitons

被引：75

作者：

Butov, LV ^{[1
]}

Lai, CW

Chemla, DS

Lozovik, YE

Campman, KL

Gossard, AC

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Russian Acad Sci, Inst Spect, Troitsk 142092, Russia

[4] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.87.216804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first measurements of the dispersion relation of a quasi-2D magnetoexciton. We demonstrate that the magnetoexciton effective mass is determined by the coupling between the center-of-mass motion and internal structure and becomes overwhelmingly larger than the sum of the electron and hole masses in high magnetic fields.

引用

页码：216804 / 1

页数：4

共 27 条

[1] EXCITON MIXING IN QUANTUM WELLS [J].

BAUER, GEW ;

ANDO, T .

PHYSICAL REVIEW B, 1988, 38 (09) :6015-6030

[2] From spatially indirect excitons to momentum-space indirect excitons by an in-plane magnetic field [J].

Butov, LV ;

Mintsev, AV ;

Lozovik, YE ;

Campman, KL ;

Gossard, AC .

PHYSICAL REVIEW B, 2000, 62 (03) :1548-1551

[3] Magneto-optics of the spatially separated electron and hole layers in GaAs/AlxGa1-xAs coupled quantum wells [J].

Butov, LV ;

Shashkin, AA ;

Dolgopolov, VT ;

Campman, KL ;

Gossard, AC .

PHYSICAL REVIEW B, 1999, 60 (12) :8753-8758

[4] Stimulated scattering of indirect excitons in coupled quantum wells: Signature of a degenerate Bose-gas of excitons [J].

Butov, LV ;

Ivanov, AL ;

Imamoglu, A ;

Littlewood, PB ;

Shashkin, AA ;

Dolgopolov, VT ;

Campman, KL ;

Gossard, AC .

PHYSICAL REVIEW LETTERS, 2001, 86 (24) :5608-5611

[5]

BYCHKOV YA, 1981, JETP LETT+, V33, P143

[6]

Das Sarma S., 1997, PERSPECTIVES QUANTUM

[7] Spin and charge density excitations and the collapse of the fractional quantum Hall state at nu=1/3 [J].

Davies, HDM ;

Harris, JC ;

Ryan, JF ;

Turberfield, AJ .

PHYSICAL REVIEW LETTERS, 1997, 78 (21) :4095-4098

[8]

DZYUBENKO AB, 1984, FIZ TVERD TELA, V26, P938

[9] LINEWIDTH DEPENDENCE OF RADIATIVE EXCITON LIFETIMES IN QUANTUM-WELLS [J].

FELDMANN, J ;

PETER, G ;

GOBEL, EO ;

DAWSON, P ;

MOORE, K ;

FOXON, C ;

ELLIOTT, RJ .

PHYSICAL REVIEW LETTERS, 1987, 59 (20) :2337-2340

[10] COLLECTIVE-EXCITATION GAP IN THE FRACTIONAL QUANTUM HALL-EFFECT [J].

GIRVIN, SM ;

MACDONALD, AH ;

PLATZMAN, PM .

PHYSICAL REVIEW LETTERS, 1985, 54 (06) :581-583

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