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

Journal Article · Thu May 15 00:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4878312· OSTI ID:22280307

Hernández, C. ^[1]; Chaubet, C. ^[2]

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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)

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.

• OSTI ID: 22280307
• Journal Information: AIP Conference Proceedings, Vol. 1598, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
ELECTRON GAS
FREQUENCY DEPENDENCE
HALL EFFECT
MAGNETORESISTANCE
TOPOLOGY
TWO-DIMENSIONAL CALCULATIONS