Stimulated scattering of indirect excitons in coupled quantum wells: Signature of a degenerate Bose-gas of excitons

被引：174
|
作者：
Butov, LV
Ivanov, AL
Imamoglu, A
Littlewood, PB
Shashkin, AA
Dolgopolov, VT
Campman, KL
Gossard, AC
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
[2] Cardiff Univ, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales
[3] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
[4] Univ Cambridge, Cavendish Lab, Dept Phys, TCM, Cambridge CB3 0HE, England
[5] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.86.5608
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We observe and analyze strongly nonlinear photoluminescence kinetics of indirect excitons in GaAs/AlGaAs coupled quantum wells at low bath temperatures, greater than or equal to 50 mK. The long recombination lifetime of indirect excitons promotes accumulation of these Bose particles in the lowest energy states and allows the photoexcited excitons to cool down to temperatures when the: dilute 2D gas of indirect excitons becomes statistically degenerate. Our main result-a strong enhancement of the exciton scattering rate to the low-energy states with increasing concentration of the indirect excitons-reveals bosonic stimulation of exciton scattering, which is a signature of a degenerate Bose-gas of excitons.
引用
收藏
页码：5608 / 5611
页数：4
相关论文
共 50 条
  • [41] BOSE-GAS OF SPIN-ORIENTED EXCITONS IN UNIAXIALLY DEFORMED GERMANIUM
    KUKUSHKIN, IV
    KULAKOVSKII, VD
    TIMOFEEV, VB
    JETP LETTERS, 1981, 34 (01) : 34 - 38
  • [42] Mott transition of excitons in coupled quantum wells
    Stern, M.
    Garmider, V.
    Umansky, V.
    Bar-Joseph, I.
    PHYSICAL REVIEW LETTERS, 2008, 100 (25)
  • [43] THERMODYNAMICS OF EXCITONS IN COUPLED QUANTUM-WELLS
    KASH, JA
    ZACHAU, M
    MENDEZ, EE
    HONG, JM
    FUKUZAWA, T
    SURFACE SCIENCE, 1992, 263 (1-3) : 502 - 505
  • [44] Indirect excitons in (111) GaAs double quantum wells
    Hubert, C.
    Biermann, K.
    Hernandez-Minguez, A.
    Santos, P. V.
    SUPERLATTICES AND MICROSTRUCTURES, 2017, 108 : 51 - 56
  • [45] Direct and indirect excitons in asymmetric double quantum wells
    Vera, F
    REVISTA MEXICANA DE FISICA, 2002, 48 : 38 - 39
  • [46] Electrostatically trapping indirect excitons in coupled InxGa1-xAs quantum wells
    Schinner, G. J.
    Schubert, E.
    Stallhofer, M. P.
    Kotthaus, J. P.
    Schuh, D.
    Rai, A. K.
    Reuter, D.
    Wieck, A. D.
    Govorov, A. O.
    PHYSICAL REVIEW B, 2011, 83 (16)
  • [47] INDIRECT-TO-DIRECT CROSSOVER OF LATERALLY CONFINED EXCITONS IN COUPLED QUANTUM-WELLS
    BRYANT, GW
    PHYSICAL REVIEW B, 1992, 46 (03): : 1893 - 1896
  • [48] Effects of applied magnetic fields on direct and indirect excitons in coupled semiconductor quantum wells
    Reyes-Gómez, E
    Oliveira, LE
    de Dios-Leyva, M
    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2005, 242 (09): : 1829 - 1832
  • [49] Long-lived spin coherence of indirect excitons in GaAs coupled quantum wells
    Beian, Mussie
    Alloing, Mathieu
    Cambril, Edmond
    Carbonell, Carmen Gomez
    Osmond, Johann
    Lemaitre, Aristide
    Dubin, Francois
    EPL, 2015, 110 (02) : 27001
  • [50] Huge density-dependent blueshift of indirect excitons in biased coupled quantum wells
    Negoita, V
    Snoke, DW
    Eberl, K
    PHYSICAL REVIEW B, 2000, 61 (04): : 2779 - 2783
12345