Agradecimentos: This material was based upon the work supported by the Air Force Office of Scientific Research under award number FA9550-18-1-0072 (P.M.A., A.B.P.). A.P.B., V.S., and R.R.N. would like to thank the European Research Council (Contract 679689) for the support. E.F.O. and D.S.G. would...

Agradecimentos: This material was based upon the work supported by the Air Force Office of Scientific Research under award number FA9550-18-1-0072 (P.M.A., A.B.P.). A.P.B., V.S., and R.R.N. would like to thank the European Research Council (Contract 679689) for the support. E.F.O. and D.S.G. would like to thank the Brazilian agencies CNPq and FAPESP (Grants 2016/18499-0 and 2019/07157-9) for the financial support. Computational support from the Center for Computational Engineering and Sciences at UNICAMP through the FAPESP/CEPID Grant No. 2013/08293-7 and the Center for Scientific Computing (NCC/GridUNESP) of São Paulo State University (UNESP) is also acknowledged. L.M.S. acknowledges CAPES (Coordination for the Improvement of Higher Education Personnel) under the Brazilian Ministry of Education for the financial support

Abstract: There has been no experimental evidence for ferromagnetic ordering in isotropic atomically thin two-dimensional crystals, until a bilayer Cr2Ge2Te6 and a three-atom thick monolayer CrI3 is shown to retain ferromagnetic ordering at finite temperatures. Here, we demonstrate successful...

Abstract: There has been no experimental evidence for ferromagnetic ordering in isotropic atomically thin two-dimensional crystals, until a bilayer Cr2Ge2Te6 and a three-atom thick monolayer CrI3 is shown to retain ferromagnetic ordering at finite temperatures. Here, we demonstrate successful isolation of a nonvan der Waals-type ultrathin nanosheet of FeS2 derived from naturally occurring pyrite mineral (FeS2) by means of liquid-phase exfoliation. Structural characterizations imply that (111)-oriented sheets are predominant and are supported theoretically by means of density functional theory surface energy calculations. Spin-polarized density theory calculations further predicted that (111)-oriented three-atom thick pyrite sheets have a stable ferromagnetic ground state different from their diamagnetic bulk counterparts. This theoretical finding is evaluated by experimentally employing low-temperature superconducting quantum interference device measurements, and an anomalous ferromagnetic kind of behavior is observed

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2013/08293-7; 2016/18499-0; 2019/07157-9

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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