Probing the topological exciton condensate via Coulomb drag

The onset of exciton condensation in a topological insulator thin film was recently predicted. We calculate the critical temperature for this transition, taking into account screening effects. Furthermore, we show that the proximity to this transition can be probed by measuring the Coulomb drag resi...

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Bibliographic Details
Published in:Physical review letters 2012-05, Vol.108 (18), p.186402-186402, Article 186402
Main Authors: Mink, M P, Stoof, H T C, Duine, R A, Polini, Marco, Vignale, G
Format: Article
Language:English
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Summary:The onset of exciton condensation in a topological insulator thin film was recently predicted. We calculate the critical temperature for this transition, taking into account screening effects. Furthermore, we show that the proximity to this transition can be probed by measuring the Coulomb drag resistivity between the surfaces of the thin film as a function of temperature. This resistivity shows an upturn upon approaching the exciton-condensed state.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.108.186402