Electronic structure and magnetic exchange interactions of Cr-based van der Waals ferromagnets. A comparative study between CrBr3 and Cr2Ge2Te6

dc.creatorFumega, Adolfo O.
dc.creatorBlanco-Canosa, Santiago
dc.creatorBabu-Vasili, H.
dc.creatorZhou, Jian-Shi
dc.creatorRivadulla, Francisco
dc.creatorPardo, Victor
dc.date.accessioned2024-01-25T18:47:08Z
dc.date.available2024-01-25T18:47:08Z
dc.date.issued2020-04-24
dc.description.abstractLow dimensional magnetism has been powerfully boosted as a promising candidate for numerous applications. The stability of the long-range magnetic order is directly dependent on the electronic structure and the relative strength of the competing magnetic exchange constants. Here, we report a comparative pressure-dependent theoretical and experimental study of the electronic structure and exchange interactions of two-dimensional ferromagnets CrBr3 and Cr2Ge2Te6 . While CrBr3 is found to be a Mott-Hubbard-like insulator, Cr2Ge2Te6 shows a charge-transfer character due to the broader character of the Te 5p bands at the Fermi level. This different electronic behaviour is responsible of the robust insulating state of CrBr3 , in which the magnetic exchange constants evolve monotonically with pressure, and the proximity to a metal-insulator transition predicted for Cr2Ge2Te6 , which causes a non-monotonic evolution of its magnetic ordering temperature. We provide a microscopic understanding for the pressure evolution of the magnetic properties of the two systems.
dc.description.departmentCenter for Dynamics and Control of Materials
dc.description.sponsorshipThis work was supported by the Spanish Govern- ment through Projects MAT2016-80762-R, PGC2018- 101334-B-C21 and PGC2018-101334-A-C22. A.O.F. also through the FPU16/02572 grant. J.S.Z was supported by National Science Foundation grant DMR-1720595.
dc.identifier.doihttps://doi.org/10.48550/arXiv.2004.11789
dc.identifier.urihttps://hdl.handle.net/2152/123509
dc.identifier.urihttps://doi.org/10.26153/tsw/50305
dc.language.isoen_US
dc.relation.ispartofCenter for Dynamics and Control of Materials Publications
dc.rights.restrictionOpen
dc.subjectvan der Waals
dc.titleElectronic structure and magnetic exchange interactions of Cr-based van der Waals ferromagnets. A comparative study between CrBr3 and Cr2Ge2Te6
dc.typeArticle

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