Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/68513
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Costa, A. T. | por |
dc.contributor.author | Santos, D. L. R. | por |
dc.contributor.author | Peres, N. M. R. | por |
dc.contributor.author | Fernández-Rossier, J. | por |
dc.date.accessioned | 2020-12-11T16:40:25Z | - |
dc.date.available | 2020-12-11T16:40:25Z | - |
dc.date.issued | 2020-09 | - |
dc.date.submitted | 2020-05 | - |
dc.identifier.citation | Costa, A. T., Santos, D. L. R., Peres, N. M., et. al.(2020). Topological magnons in CrI3 monolayers: an itinerant fermion description. 2D Materials, 7(4), 045031 | por |
dc.identifier.issn | 2053-1583 | por |
dc.identifier.uri | https://hdl.handle.net/1822/68513 | - |
dc.description.abstract | Magnons dominate the magnetic response of ferromagnetic two-dimensional crystals such as CrI3. Because of the arrangement of Cr spins in a honeycomb lattice, magnons in CrI3 bear a strong resemblance with electrons in graphene. Neutron scattering experiments carried out in bulk CrI3 show the existence of a gap at the Dirac points, conjectured to have a topological nature. We propose a theory for magnons in CrI3 monolayers based on an itinerant fermion picture, with a Hamiltonian derived from first principles. We obtain the magnon dispersion for 2D CrI3 with a gap at the Dirac points with the same Berry curvature in both valleys. For CrI3 ribbons, we find chiral in-gap edge states. Analysis of the magnon wave functions in momentum space confirms their topological nature. Importantly, our approach does not require a spin Hamiltonian, and can be applied to insulating and conducting 2D materials with any type of magnetic order. | por |
dc.description.sponsorship | GVA - Generalitat Valenciana(Prometeo2017/139); European Commission through the project 'Graphene- Driven Revolutions in ICT and Beyond' (reference No. 881603 – Core 3), and the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Financing UID/FIS/04650/2013, COMPETE2020, PORTUGAL2020, FEDER and the Portuguese Foundation for Science and Technology (FCT) through projects PTDC/FIS-NAN/3668/2013 and POCI-01-0145-FEDER-028114. J F-R acknowledges financial support from FCT UTAPEXPL/NTec/0046/2017 project, as well as Generalitat Valenciana funding Prometeo2017/139 and MINECO Spain (Grant No. MAT2016-78625-C2). D L R S thankfully acknowledges the use of HPC resources provided by the National Laboratory for Scientific Computing (LNCC/MCTI, Brazil). A T C thankfully acknowledges the use of computer resources at MareNostrum and the technical support provided by Barcelona Supercomputing Center (RES-FI-2019-2-0034) | por |
dc.language.iso | eng | por |
dc.publisher | IOP Publishing Ltd | por |
dc.rights | openAccess | por |
dc.subject | 2D magnets | por |
dc.subject | Fermionic Hamiltonian | por |
dc.subject | Magnons | por |
dc.subject | Topological matter | por |
dc.subject | Trihalides | por |
dc.subject | Van der Waals magnets | por |
dc.title | Topological magnons in CrI3 monolayers: an itinerant fermion description | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://iopscience.iop.org/article/10.1088/2053-1583/aba88f/meta | por |
oaire.citationIssue | 4 | por |
oaire.citationVolume | 7 | por |
dc.date.updated | 2020-12-11T14:44:59Z | - |
dc.identifier.eissn | 2053-1583 | por |
dc.identifier.doi | 10.1088/2053-1583/aba88f | por |
dc.subject.fos | Ciências Naturais::Ciências Físicas | por |
dc.subject.wos | Science & Technology | por |
sdum.export.identifier | 7586 | - |
sdum.journal | 2D Materials | por |
Aparece nas coleções: | CDF - CEP - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2002.00077.pdf | 558,87 kB | Adobe PDF | Ver/Abrir |