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Published August 9, 2019 | Published + Submitted
Journal Article Open

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 ν_T = 1. These correlations are manifested by a nonlinear suppression of the Coulomb pseudogap which inhibits low energy interlayer tunneling in weakly coupled bilayers. The pseudogap suppression is strongest at ν_T = 1 and grows rapidly as the critical layer separation for exciton condensation is approached from above.

Additional Information

© 2019 American Physical Society. Received 21 March 2019; published 8 August 2019. We thank G. Chaudhary, S. Das Sarma, P. A. Lee, A. H. MacDonald, and G. Refael for helpful discussions. This work was supported in part by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant No. GBMF1250. The work at Princeton University was funded by the Gordon and Betty Moore Foundation through Grant No. GBMF4420, and by the National Science Foundation MRSEC Grant No. 1420541.

Attached Files

Published - PhysRevLett.123.066802.pdf

Submitted - 1903.08262.pdf

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August 19, 2023
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