Details

Autor(en) / Beteiligte

• Dmowski, L. H.
• Zduniak, A.
• Litwin-Staszewska, E.
• Contreras, S.
• Knap, W.
• Robert, J. L.

Titel

Study of Quantum and Classical Scattering Times in Pseudomorphic AlGaAs/InGaAs/GaAs by Means of Pressure

Ist Teil von

• physica status solidi (b), 1996-11, Vol.198 (1), p.283-288

Ort / Verlag

Berlin: WILEY-VCH Verlag

Erscheinungsjahr

1996

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Quantum (single particle) and classical (transport) scattering times have been measured and analyzed as a function of density of the two‐dimensional electron gas (2DEG) in pseudomorphic AlGaAs/InGaAs/GaAs heterostructures. Hydrostatic pressure was used to decrease and infrared LED light pulses to increase the 2DEG density. Our experimental results allow us to distinguish two different persistent photoionization mechanisms induced by the light pulses, which have quite different effects on the two kinds of scattering times. We have also found evidence that a modification of the spatial correlation of charges on remote donors in the barrier (by means of pressure and/or illumination by light pulses) affects the quantum lifetime much more than the transport scattering time.