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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Critical tunneling currents in the regime of bilayer excitons

Focus on Quantum Correlations in Tailored Matter

L Tiemann1, W Dietsche, M Hauser and K von Klitzing

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Part of Focus on Quantum Correlations in Tailored Matter

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 Icritical which depend on the strength of the condensate state.


PACS

73.21.Fg Quantum wells

73.40.Gk Tunneling

73.20.Mf Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

71.70.Di Landau levels

73.63.Hs Quantum wells

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 4 (April 2008)

Received 25 January 2008

Published 30 April 2008



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