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Title: AC-magnetotransport of a 2DEG in the quantum Hall regime

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.
Authors:
 [1] ;  [2]
  1. Departamento de Física, Universidad de los Andes, A.A. 4976, Bogotá D.C. (Colombia)
  2. Laboratoire Charles Coulomb L2C, Université Montpellier II, Pl. E: Bataillon, 34095 Montpellier Cedex 5 (France)
Publication Date:
OSTI Identifier:
22280307
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1598; Journal Issue: 1; Conference: LDSD 2011: 7. international conference on low dimensional structures and devices, Telchac (Mexico), 22-27 May 2011; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAPACITANCE; ELECTRON GAS; FREQUENCY DEPENDENCE; HALL EFFECT; MAGNETORESISTANCE; TOPOLOGY; TWO-DIMENSIONAL CALCULATIONS