Literature DB >> 11415313

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

L V Butov1, A L Ivanov, A Imamoglu, P B Littlewood, A A Shashkin, V T Dolgopolov, K L Campman, A C Gossard.   

Abstract

We observe and analyze strongly nonlinear photoluminescence kinetics of indirect excitons in GaAs/AlGaAs coupled quantum wells at low bath temperatures, > or = 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 where 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.

Year:  2001        PMID： 11415313     DOI： 10.1103/PhysRevLett.86.5608

Source DB:  PubMed          Journal:  Phys Rev Lett        ISSN： 0031-9007            Impact factor:   9.161


  8 in total

1.  Spontaneous coherence in a cold exciton gas.

Authors:  A A High; J R Leonard; A T Hammack; M M Fogler; L V Butov; A V Kavokin; K L Campman; A C Gossard
Journal:  Nature       Date:  2012-03-21       Impact factor: 49.962

2.  Spatially non-uniform ground state and quantized vortices in a two-component Bose-Einstein condensate of magnons.

Authors:  P Nowik-Boltyk; O Dzyapko; V E Demidov; N G Berloff; S O Demokritov
Journal:  Sci Rep       Date:  2012-06-29       Impact factor: 4.379

3.  Enabling valley selective exciton scattering in monolayer WSe2 through upconversion.

Authors:  M Manca; M M Glazov; C Robert; F Cadiz; T Taniguchi; K Watanabe; E Courtade; T Amand; P Renucci; X Marie; G Wang; B Urbaszek
Journal:  Nat Commun       Date:  2017-04-03       Impact factor: 14.919

4.  Bogoliubov waves and distant transport of magnon condensate at room temperature.

Authors:  Dmytro A Bozhko; Alexander J E Kreil; Halyna Yu Musiienko-Shmarova; Alexander A Serga; Anna Pomyalov; Victor S L'vov; Burkard Hillebrands
Journal:  Nat Commun       Date:  2019-06-05       Impact factor: 14.919

5.  Stability of Spin-Wave Solitons in Bose-Einstein Condensates of Magnons: A Possible Application in Ferromagnetic Films.

Authors:  Lucas Carvalho Pereira; Valter Aragão do Nascimento
Journal:  Materials (Basel)       Date:  2022-03-31       Impact factor: 3.623

6.  Phase diagram for magnon condensate in Yttrium Iron Garnet film.

Authors:  Fuxiang Li; Wayne M Saslow; Valery L Pokrovsky
Journal:  Sci Rep       Date:  2013       Impact factor: 4.379

7.  Pancharatnam-Berry phase in condensate of indirect excitons.

Authors:  J R Leonard; A A High; A T Hammack; M M Fogler; L V Butov; K L Campman; A C Gossard
Journal:  Nat Commun       Date:  2018-06-04       Impact factor: 14.919

8.  Indirect excitons in van der Waals heterostructures at room temperature.

Authors:  E V Calman; M M Fogler; L V Butov; S Hu; A Mishchenko; A K Geim
Journal:  Nat Commun       Date:  2018-05-14       Impact factor: 14.919
  8 in total

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