Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of twisted bilayer graphene
| dc.contributor.author | Julku, Aleksi | |
| dc.contributor.author | Peltonen, Teemu J. | |
| dc.contributor.author | Liang, Long | |
| dc.contributor.author | Heikkilä, Tero T. | |
| dc.contributor.author | Törmä, Päivi | |
| dc.date.accessioned | 2020-03-30T14:40:42Z | |
| dc.date.available | 2020-03-30T14:40:42Z | |
| dc.date.issued | 2020 | |
| dc.identifier.citation | Julku, A., Peltonen, T. J., Liang, L., Heikkilä, T. T., & Törmä, P. (2020). Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of twisted bilayer graphene. <i>Physical Review B</i>, <i>101</i>(6), Article 060505. <a href="https://doi.org/10.1103/PhysRevB.101.060505" target="_blank">https://doi.org/10.1103/PhysRevB.101.060505</a> | |
| dc.identifier.other | CONVID_35110317 | |
| dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/68377 | |
| dc.description.abstract | We study superconductivity of twisted bilayer graphene with local and nonlocal attractive interactions. We obtain the superfluid weight and Berezinskii-Kosterlitz-Thouless (BKT) transition temperature for microscopic tight-binding and low-energy continuum models. We predict qualitative differences between local and nonlocal interaction schemes which could be distinguished experimentally. In the flat-band limit where the pair potential exceeds the band width we show that the superfluid weight and BKT temperature are determined by multiband processes and quantum geometry of the band. | en |
| dc.format.mimetype | application/pdf | |
| dc.language | eng | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.relation.ispartofseries | Physical Review B | |
| dc.rights | In Copyright | |
| dc.subject.other | BKT transition | |
| dc.subject.other | multiband superconductivity | |
| dc.subject.other | superconducting RF | |
| dc.subject.other | superconducting fluctuations | |
| dc.subject.other | superconducting phase transition | |
| dc.subject.other | superfluid density | |
| dc.title | Superfluid weight and Berezinskii-Kosterlitz-Thouless transition temperature of twisted bilayer graphene | |
| dc.type | research article | |
| dc.identifier.urn | URN:NBN:fi:jyu-202003302590 | |
| dc.contributor.laitos | Fysiikan laitos | fi |
| dc.contributor.laitos | Department of Physics | en |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
| dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
| dc.description.reviewstatus | peerReviewed | |
| dc.relation.issn | 2469-9950 | |
| dc.relation.numberinseries | 6 | |
| dc.relation.volume | 101 | |
| dc.type.version | publishedVersion | |
| dc.rights.copyright | © 2020 American Physical Society | |
| dc.rights.accesslevel | openAccess | fi |
| dc.type.publication | article | |
| dc.relation.grantnumber | 317118 | |
| dc.subject.yso | suprajohtavuus | |
| dc.subject.yso | nanorakenteet | |
| dc.subject.yso | grafeeni | |
| dc.format.content | fulltext | |
| jyx.subject.uri | http://www.yso.fi/onto/yso/p9398 | |
| jyx.subject.uri | http://www.yso.fi/onto/yso/p25315 | |
| jyx.subject.uri | http://www.yso.fi/onto/yso/p24483 | |
| dc.rights.url | http://rightsstatements.org/page/InC/1.0/?language=en | |
| dc.relation.doi | 10.1103/PhysRevB.101.060505 | |
| dc.relation.funder | Research Council of Finland | en |
| dc.relation.funder | Suomen Akatemia | fi |
| jyx.fundingprogram | Academy Project, AoF | en |
| jyx.fundingprogram | Akatemiahanke, SA | fi |
| jyx.fundinginformation | This work was supported by the Academy of Finland underProjects No. 303351, No. 307419, No. 317118, and No.318987, and by the European Research Council (ERC-2013-AdG-340748-CODE). L.L. acknowledges the Aalto Centrefor Quantum Engineering for support. A.J. acknowledgessupport from the Vilho, Yrjö, and Kalle Väisälä Foundation.Computing resources were provided by Triton cluster at AaltoUniversity. We acknowledge grants of computer capacity fromthe Finnish Grid and Cloud Infrastructure (persistent identifierurn:nbn:fi:research-infras-2016072533) | |
| dc.type.okm | A1 |
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