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True Bilayer Exciton Condensate of One-Dimensional Electrons
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-6166-181X
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 119, no 3, article id 037601Article in journal (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, article id 037601
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-211740DOI: 10.1103/PhysRevLett.119.037601ISI: 000406046500026OAI: oai:DiVA.org:kth-211740DiVA, id: diva2:1133555
Note

QC 20170816

Available from: 2017-08-16 Created: 2017-08-16 Last updated: 2017-08-16Bibliographically approved

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Kantian, AdrianAbergel, David

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