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Related Experiment Videos

Dissipation and tunneling in quantum Hall bilayers.

Robert L Jack1, Derek K K Lee, Nigel R Cooper

  • 1Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom.

Physical Review Letters
|September 28, 2004
PubMed
Summary

Quantum Hall bilayers exhibit unique transport properties influenced by dissipation. Researchers computed quantum corrections to semiclassical dynamics, revealing a zero-temperature tunneling current peak due to Josephson-like oscillation decay.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Phenomena

Background:

  • Quantum Hall bilayers are systems exhibiting complex electronic behaviors.
  • Understanding the interplay between transport and dissipation is crucial for characterizing these systems.

Purpose of the Study:

  • To investigate quantum corrections to the semiclassical dynamics of quantum Hall bilayers.
  • To reinterpret existing tunneling measurements in these systems.
  • To analyze the impact of intrinsic dissipation on quantum transport.

Main Methods:

  • Development of a theoretical framework incorporating quantum corrections.
  • Application of a thought experiment to model system dynamics.
  • Computation of quantum corrections to semiclassical equations of motion.

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Main Results:

  • A novel peak in the zero-temperature tunneling current was identified.
  • This peak originates from the decay of Josephson-like oscillations into incoherent charge fluctuations.
  • An in-plane magnetic field was found to induce asymmetric line shapes in tunneling current resonances.

Conclusions:

  • The study provides a new interpretation for tunneling measurements in quantum Hall bilayers.
  • Quantum corrections significantly influence the system's transport properties.
  • Dissipation plays a key role in the observed phenomena, particularly the tunneling current peak.