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True Bilayer Exciton Condensate of One-Dimensional Electrons
Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden.
Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden .
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 119, no 3Article in journal, Letter (Refereed) Published
Abstract [en]

We theoretically predict that a true bilayer exciton condensate, characterized by off-diagonal long-range order and global phase coherence, can be created in one-dimensional solid state electron systems. The mechanism by which this happens is to introduce a single particle hybridization of electron and hole populations, which locks the phase of the relevant mode and hence invalidates the Mermin-Wagner theorem. Electron-hole interactions then amplify this tendency towards off-diagonal long-range order, enhancing the condensate properties by more than an order of magnitude over the noninteracting limit. We show that the temperatures below which a substantial condensate fraction would form could reach hundreds of Kelvin, a benefit of the weak screening in one-dimensional systems.

Place, publisher, year, edition, pages
American Physical Society , 2017. Vol. 119, no 3
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-336280DOI: 10.1103/PhysRevLett.119.037601OAI: oai:DiVA.org:uu-336280DiVA, id: diva2:1165534
Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2017-12-13

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Publisher's full textElectronic full texthttp://link.aps.org/doi/10.1103/PhysRevLett.119.037601

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