Intrinsic gap and exciton condensation in the nu_T=1 bilayer system

Abstract

We investigate the quasiparticle excitation of the bilayer quantum Hall (QH) system at total filling factor ${\nu }_{\mathrm{T}}=1$ in the limit of negligible interlayer tunneling under tilted magnetic field. We show that the intrinsic quasiparticle excitation is of purely pseudospin origin and solely governed by the inter- and intra-layer electron interactions. A model based on exciton formation successfully explains the quantitative behavior of the quasiparticle excitation gap, demonstrating the existence of a link between the excitonic QH state and the composite fermion liquid. Our results provide a new insight into the nature of the phase transition between the two states.

arXiv comment4 pages, 3 figures

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Cited by in corpus (10)

• Entanglement Spectrum and Entanglement Thermodynamics of Quantum Hall Bilayers at nu=1
• Numerical Study of Quantum Hall Bilayers at Total Filling ${\nu }_T=1$: A New Phase at Intermediate Layer Distances
• Gauge Fluctuations and Interlayer Coherence in Bilayer Composite Fermion Metals
• Finite-momentum condensate of magnetic excitons in a bilayer quantum Hall system
• Clausius-Clapeyron Relations For First Order Phase Transitions In Bilayer Quantum Hall Systems
• Exciton Condensation in Quantum Hall Bilayers at Total Filling ${\nu }_T=5$
• Quantum Hall Bilayer as Pseudospin Magnet
• Stability of the Excitonic Phase in Bilayer Quantum Hall Systems at Total Filling One -- Effects of Finite Well Width and Pseudopotentials --
• Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems
• Voltage Induced Dynamical Quantum Phase Transitions in Exciton Condensates