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.

4 pages, 3 figures

References in corpus (3)

• Paired composite fermion phase of quantum Hall bilayers at ν= 1/2 + 1/2
• Evidence for a finite temperature phase transition in a bilayer quantum Hall system
• Pseudospin vortex-antivortex states with interwoven spin textures in double layer quantum Hall systems

Cited by in corpus (4)

• Entanglement Spectrum and Entanglement Thermodynamics of Quantum Hall Bilayers at nu=1
• Finite-momentum condensate of magnetic excitons in a bilayer quantum Hall system
• Quantum Hall Bilayer as Pseudospin Magnet
• Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems