Electron-phonon coupling in the two-phonon mode ternary alloy Al0.25In0.75As/Ga0.25In0.75As quantum well

Clément Faugeras (1) , Gérard Martinez (1) , Fabio Capotondi (2, 3) , Giorgio Biasiol (2) , Lucia Sorba (2, 3)

1 LCMI-GHMFL - Laboratoire des champs magnétiques intenses
2 INFM - NEST-INFM
3 Dipartimento di Scienze Fisiche, Informatiche e Matematiche [Modena]

We have investigated the infrared transmission of a two-dimensional electron gas (2DEG) confined in a Al0.25In0.75As/Ga0.25In0.75As single quantum well in order to study the electron optical phonon interaction in a two-phonon mode system. Infrared transmission experiments have been performed in both the perpendicular Faraday (PF) and tilted Faraday (TF) configurations for which the growth axis of the sample is tilted with respect to the incident light propagation direction and to the magnetic-field direction. The experimental results lead to question the validity of the concept of polaron mass in a real material.

Mots clés: polaron; electron-phonon interaction; infrared spectroscopy; GaInAs

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Clément Faugeras, Gérard Martinez, Fabio Capotondi, Giorgio Biasiol, Lucia Sorba. Electron-phonon coupling in the two-phonon mode ternary alloy Al0.25In0.75As/Ga0.25In0.75As quantum well. EPL - Europhysics Letters, 2004, 67, pp.1031. ⟨10.1209/epl/i2004-10153-2⟩. ⟨hal-00019200⟩