AC-magnetotransport of a 2DEG in the quantum Hall regime Auteur(s): Hernandez Carlos, Consejo C., Chaubet C.
Conference: 7TH INTERNATIONAL CONFERENCE ON LOW DIMENSIONAL STRUCTURES AND DEVICES: (LDSD 2011) (Telchac, MX, 2011-05-22) Ref HAL: hal-01071270_v1 DOI: 10.1063/1.4878312 WoS: 000341459700047 Exporter : BibTex | endNote Résumé: In this paper we present an ac-magneto-transport study of a two-dimensional electron gas (2DEG) in the quantum Hall effect (QHE) regime, for frequencies in the range [100Hz, 1MHz]. We present a new approach to understand admittance measurements based in the Landauer-Buttiker formalism for QHE edge channels and taking into account the capacitance and the topology of the cables connected to the contacts used in the measurements. Our model predicts an universal behavior with the a-dimensional parameter RCω where R is the 2 wires resistance of the 2DEG, C the capacitance cables and the angular frequency, in agreement with experiments |