Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers

Details Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers Exciton condensate at a total filling factor of 1 in Corbino 2D electron bilayers

2007-07-31

arxiv.org/abs/0707.4590v2

Phys. Rev. B 77, 033306 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.77.033306

Magneto-transport and drag measurements on a quasi-Corbino 2D electron bilayer at the systems total filling factor 1 (v_tot=1) reveal a drag voltage that is equal in magnitude to the drive voltage as soon as the two layers begin to form the expected v_tot=1 exciton condensate. The identity of both voltages remains present even at elevated temperatures of 0.25 K. The conductance in the current carrying layer vanishes only in the limit of strong coupling between the two layers and at T->0 K which suggests the presence of an excitonic circular current.

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