Anomalous exciton transport in Cu2O: Excitonic superfluidity or phonon-wind effect?

Solid State Communications

Volumn 101, Issue 5, 1997, Pages 313-317

  Benson, E ^b   Fortin, E ^b   Mysyrowicz, A ^a  

^a LABORATOIRE D OPTIQUE APPLIQUÉE   (France)

^b NONE

Author keywords

A. Semiconductors; D. Optical properties

Indexed keywords

COPPER OXIDES; EXCITONS; OPTICAL PROPERTIES; PHONONS;

ANOMALOUS EXCITON TRANSPORT; AUGER HEATING; BOSE EINSTEIN CONDENSATION; EXCITONIC SUPERFLUIDITY; PHONON WIND EFFECT;

SEMICONDUCTOR MATERIALS;

EID: 0031077644     PISSN: 00381098     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0038-1098(96)00600-X     Document Type: Article

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11. To be more precise, acoustic phonons are generated in the crystal during ortho-to para-exciton conversion of the cold probe excitons. However, most of these probe-produced acoustic phonons are generated in the bulk; consequently they scatter excitons nearly isotropically, not preferentially towards the rear surface.
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17. The lack of a significant raise of lattice temperature (hot spot) at the front surface is ruled out by the fact that the spectral position of the exciton, which depends on lattice temperature remains unchanged during the excitation laser pulse [3, 5].