Inhibited recombination of charged magnetoexcitons

被引：16

作者：

Okamura, H ^{[1
]}

Heiman, D

Sundaram, M

Gossard, AC

机构：

[1] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan

[2] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

[3] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA

[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.58.R15985

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Time-resolved photoluminescence measurements show that the decay time for charged excitons in a GaAs two-dimensional electron gas increases by an order of magnitude at high magnetic fields. Unlike neutral excitons, the charged exciton center-of-mass is spatially confined in a ''magnetically adjustable quantum dot'' by the cyclotron orbit and the quantum well. The inhibited recombination is explained by a reduced phase coherence volume of the magnetically confined charged excitons. [S0163-1829(98)51748-1].

引用

页码：15985 / 15988

页数：4

共 31 条

[1] RADIATIVE LIFETIME OF FREE-EXCITONS IN QUANTUM-WELLS [J].

ANDREANI, LC ;

TASSONE, F ;

BASSANI, F .

SOLID STATE COMMUNICATIONS, 1991, 77 (09) :641-645

[2] EFFECTIVE MASSES OF HOLES AT GAAS-ALGAAS HETEROJUNCTIONS [J].

BROIDO, DA ;

SHAM, LJ .

PHYSICAL REVIEW B, 1985, 31 (02) :888-892

[3]

BROIDO DA, 1987, SPRINGER SERIES SOLI, V71, P288

[4] ELECTRON-CONCENTRATION-DEPENDENT QUANTUM-WELL LUMINESCENCE - EVIDENCE FOR A NEGATIVELY CHARGED EXCITON [J].

BUHMANN, H ;

MANSOURI, L ;

WANG, J ;

BETON, PH ;

MORI, N ;

EAVES, L ;

HENINI, M ;

POTEMSKI, M .

PHYSICAL REVIEW B, 1995, 51 (12) :7969-7972

[5]

CHAPMAN JR, 1997, PHYS REV B, V55, pR1022

[6] RADIATIVE LIFETIMES OF EXCITONS IN QUANTUM-WELLS - LOCALIZATION AND PHASE-COHERENCE EFFECTS [J].

CITRIN, DS .

PHYSICAL REVIEW B, 1993, 47 (07) :3832-3841

[7] SUPPRESSION OF GROUND-STATE OPTICAL RECOMBINATION IN THE QUANTUM HALL REGIME [J].

DAHL, M ;

HEIMAN, D ;

PINCZUK, A ;

GOLDBERG, BB ;

PFEIFFER, LN ;

WEST, KW .

PHYSICAL REVIEW B, 1992, 45 (12) :6957-6960

[8] DENSITY-DEPENDENT EXCITON RADIATIVE LIFETIMES IN GAAS QUANTUM-WELLS [J].

ECCLESTON, R ;

FEUERBACHER, BF ;

KUHL, J ;

RUHLE, WW ;

PLOOG, K .

PHYSICAL REVIEW B, 1992, 45 (19) :11403-11406

[9] SUBBANDS AND LANDAU-LEVELS IN THE TWO-DIMENSIONAL HOLE GAS AT THE GAAS-ALXGA1-XAS INTERFACE [J].

EKENBERG, U ;

ALTARELLI, M .

PHYSICAL REVIEW B, 1985, 32 (06) :3712-3722

[10]

FAVROT G, UNPUB

← 1 2 3 4 →