Polaron-induced lattice distortion of (In,Ga)As/GaAs quantum dots by optically excited carriers.
Nanotechnology
; 27(42): 425702, 2016 Oct 21.
Article
em En
| MEDLINE
| ID: mdl-27622774
ABSTRACT
We report on a high resolution x-ray diffraction study unveiling the effect of carriers optically injected into (In,Ga)As quantum dots on the surrounding GaAs crystal matrix. We find a tetragonal lattice expansion with enhanced elongation along the [001] crystal axis that is superimposed on an isotropic lattice extension. The isotropic contribution arises from excitation induced lattice heating as confirmed by temperature dependent reference studies. The tetragonal expansion on the femtometer scale is tentatively attributed to polaron formation by carriers trapped in the quantum dots.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Nanotechnology
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Alemanha