Critical tunneling currents in the regime of bilayer excitons

Abstract

We have investigated the tunneling properties of an electron double quantum well system where the lowest Landau level of each quantum well is half filled. This system is expected to be a Bose condensate of excitons. Our four-terminal dc measurements reveal a nearly vanishing interlayer voltage and the existence of critical tunneling currents which depend on the strength of the condensate state.

To appear in "Focus on Quantum Correlations in Tailored Matter" in the New Journal of Physics

References in corpus (4)

• Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers
• Evidence for a finite temperature phase transition in a bilayer quantum Hall system
• Interlayer Transport in Bilayer Quantum Hall Systems
• Coherent Tunneling in Exciton Condensates of Bilayer Quantum Hall Systems

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• Critical currents and self organization in quantum Hall bilayers
• Breakdown of counterflow superfluidity in a disordered quantum Hall bilayer
• Nanotransformation and current fluctuations in exciton condensate junctions
• Interplay between the coherent and incoherent transport in quantum Hall bilayers
• Spin Supercurrent in the Canted Antiferromagnetic Phase
• Capacitance and conductance oscillations from electron tunneling into high energy levels of a quantum well in a p-i-n diode
• Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems
• Density dependence of the excitation gaps in an undoped Si/SiGe double-quantum-well heterostructure
• Role of the compensating current in the weak Josphson coupling regime: An extended study on excitonic Josephson junctions