Precursors to Exciton Condensation in Quantum Hall Bilayers

Abstract

Tunneling spectroscopy reveals evidence for interlayer electron-hole correlations in quantum Hall bilayer two-dimensional electron systems at layer separations near, but above, the transition to the incompressible exciton condensate at total Landau level filling ${\nu }_T=1$. These correlations are manifested by a non-linear suppression of the Coulomb pseudogap which inhibits low energy interlayer tunneling in weakly-coupled bilayers. The pseudogap suppression is strongest at ${\nu }_T=1$ and grows rapidly as the critical layer separation for exciton condensation is approached from above.

5 pages, 4 figures. Published version

References in corpus (10)

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• Composite fermion duality for half-filled multicomponent Landau Levels
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• Effect of magnetization on the tunneling anomaly in compressible quantum Hall states
• Semiclassical theory of the tunneling anomaly in partially spin-polarized compressible quantum Hall states
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• Excitonic phases in a spatially separated electron-hole ladder model
• Quantum Hall effects of exciton condensate in topological flat bands
• Pairing of Composite-Electrons and Composite-Holes in ${\nu }_T=1$ Quantum Hall Bilayers
• 0D-2D Heterostructure for making very Large Quantum Registers using itinerant Bose-Einstein Condensate of Excitons
• PH Pfaffian intra and inter correlations in the quantum Hall bilayer
• On dualities of paired quantum Hall bilayer states at ${\nu }_T=\frac{1}{2}+\frac{1}{2}$
• 2D bilayer electron-hole superfluidity with unequal and anisotropic masses
• Role of the compensating current in the weak Josphson coupling regime: An extended study on excitonic Josephson junctions