UNIGE document Scientific Article
previous document  unige:4205  next document
add to browser collection

Relaxation time of a chiral quantum R-L circuit

Gabelli, Julien
Fève, Gwendal
Kontos, Takis
Berroir, Jean-Marc
Placais, B.
Glattli, D. Christian
Etienne, Bernard
Jin, Yong
show hidden authors show all authors [1 - 9]
Published in Physical Review Letters. 2007, vol. 98, p. 166806
Abstract We report on the GHz complex admittance of a chiral one dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in series with a tunable resistor (R) formed by a quantum point contact. Electron interactions between edges are screened by a pair of side gates. Conductance steps are observed on both real and imaginary parts of the admittance. Remarkably, the phase of the admittance is transmission-independent. This shows that the relaxation time of a chiral R-L circuit is resistance independent. A current and charge conserving scattering theory is presented that accounts for this observation with a relaxation time given by the electronic transit time in the circuit.
Keywords Carrier relaxation timeConductors (electric)InductorsQuantum Hall effectQuantum point contactsResistorsRLC circuits
Full text
(ISO format)
GABELLI, Julien et al. Relaxation time of a chiral quantum R-L circuit. In: Physical Review Letters, 2007, vol. 98, p. 166806. https://archive-ouverte.unige.ch/unige:4205

224 hits



Deposited on : 2009-11-30

Export document
Format :
Citation style :