Optical valley separation in two-dimensional semimetals with tilted Dirac cones
dc.contributor.author | Wild, A | |
dc.contributor.author | Mariani, E | |
dc.contributor.author | Portnoi, ME | |
dc.date.accessioned | 2023-11-07T09:16:06Z | |
dc.date.issued | 2023-11-06 | |
dc.date.updated | 2023-11-06T21:03:16Z | |
dc.description.abstract | Quasiparticles emerging in crystalline materials can possess a binary flavor known as the valley quantum number which can be used as a basis to encode information in an emerging class of valleytronic devices. Here we show that two-dimensional semimetals with tilted Dirac cones in the electronic band structure exhibit spatial separation of carriers belonging to different valleys under illumination. In stark contrast to gapped Dirac materials this optovalleytronic phenomenon occurs in systems with intact inversion and time-reversal symmetry that host gapless Dirac cones in the band structure, thereby retaining the exceptional graphene-like transport properties. We thus demonstrate that optical valley separation is possible at arbitrarily low photon frequencies including the deep infrared and terahertz regimes with full gate tunability via Pauli blocking. As a specific example of our theory, we predict tunable valley separation in the proposed two-dimensional tilted Dirac cone semimetal 8-Pmmn borophene for incident infrared photons at room temperature. This work highlights the potential of two-dimensional tilted Dirac cone materials as a platform for tunable broadband optovalleytronic applications. | en_GB |
dc.description.sponsorship | European Union Horizon 2020 | en_GB |
dc.description.sponsorship | NATO | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.description.sponsorship | Royal Society | en_GB |
dc.format.extent | 19211-1-19211-10 | |
dc.identifier.citation | Vol. 13, article 19211 | en_GB |
dc.identifier.doi | https://doi.org/10.1038/s41598-023-45940-4 | |
dc.identifier.grantnumber | 823878 | en_GB |
dc.identifier.grantnumber | 823728 | en_GB |
dc.identifier.grantnumber | NATO.SPS.MYP.G5860 | en_GB |
dc.identifier.grantnumber | 2239575 | en_GB |
dc.identifier.grantnumber | IEC/R2/192166 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/134447 | |
dc.identifier | ORCID: 0000-0001-5618-0993 (Portnoi, Mikhail) | |
dc.identifier | ScopusID: 7005697142 (Portnoi, Mikhail) | |
dc.identifier | ResearcherID: E-1923-2011 (Portnoi, Mikhail) | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Research | en_GB |
dc.rights | © The Author(s) 2023. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | en_GB |
dc.title | Optical valley separation in two-dimensional semimetals with tilted Dirac cones | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2023-11-07T09:16:06Z | |
dc.identifier.issn | 2045-2322 | |
dc.description | This is the final version. Available on open access from Nature Research via the DOI in this record | en_GB |
dc.description | Data availability: All data generated or analysed during this study are included in this published article and its supplementary information files. | en_GB |
dc.identifier.journal | Scientific Reports | en_GB |
dc.relation.ispartof | Scientific Reports, 13 | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2023-10-26 | |
dcterms.dateSubmitted | 2023-08-04 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2023-11-06 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2023-11-06T21:03:20Z | |
refterms.versionFCD | EVoR | |
refterms.dateFOA | 2023-11-07T09:16:07Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2023-11-06 |
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the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.