Frohlich Mass in GaAs-based Structures

Clément Faugeras (1) , Gérard Martinez (1) , A. Riedel (2) , Rudolf Hey (2) , Klaus-Jurgen Friedland (2) , Yuri A. Bychkov (1, 3)

1 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
2 PDI - Paul-Drude-Institut für Festkörperelektronik
3 L.D. Landau Institute for Theoretical Physics of RAS

The Frohlich interaction is one of the main electron-phonon intrinsic interactions in polar materials originating from the coupling of one itinerant electron with the macroscopic electric field generated by any longitudinal optical (LO) phonon. Infrared magnetoabsorption measurements of doped GaAs quantum well structures have been carried out in order to test the concept of Fro hlich interaction and polaron mass in such systems. These new experimental results lead one to question the validity of this concept in a real system.

Mots clés: Polaron; infrared spectroscopy; effective mass; frohlich interaction

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

Clément Faugeras, Gérard Martinez, A. Riedel, Rudolf Hey, Klaus-Jurgen Friedland, et al.. Frohlich Mass in GaAs-based Structures. Physical Review Letters, 2004, 92, pp.107403. ⟨10.1103/PhysRevLett.92.107403⟩. ⟨hal-00019193⟩