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Long-range ferrimagnetic order in a two-dimensional supramolecular Kondo lattice
Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland.;Delft Univ Technol, Kavli Inst Nanosci, Dept Quantum Nanosci, Lorentzweg 1, NL-2628 CJ Delft, Netherlands..
Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Inst Nano Sci & Technol, Phase 10,Sect 64, Mohali 160062, Punjab, India..ORCID iD: 0000-0001-6607-5484
Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland..
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2017 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, article id 15388Article in journal (Refereed) Published
Abstract [en]

Realization of long-range magnetic order in surface-supported two-dimensional systems has been challenging, mainly due to the competition between fundamental magnetic interactions as the short-range Kondo effect and spin-stabilizing magnetic exchange interactions. Spin-bearing molecules on conducting substrates represent a rich platform to investigate the interplay of these fundamental magnetic interactions. Here we demonstrate the direct observation of long-range ferrimagnetic order emerging in a two-dimensional supramolecular Kondo lattice. The lattice consists of paramagnetic hexadeca-fluorinated iron phthalocyanine (FeFPc) and manganese phthalocyanine (MnPc) molecules co-assembled into a checkerboard pattern on single-crystalline Au(111) substrates. Remarkably, the remanent magnetic moments are oriented in the out-of-plane direction with significant contribution from orbital moments. First-principles calculations reveal that the FeFPc-MnPc antiferromagnetic nearest-neighbour coupling is mediated by the Ruderman-Kittel-Kasuya-Yosida exchange interaction via the Au substrate electronic states. Our findings suggest the use of molecular frameworks to engineer novel low-dimensional magnetically ordered materials and their application in molecular quantum devices.

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2017. Vol. 8, article id 15388
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Condensed Matter Physics
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URN: urn:nbn:se:uu:diva-325698DOI: 10.1038/ncomms15388ISI: 000401908100002PubMedID: 28530247OAI: oai:DiVA.org:uu-325698DiVA, id: diva2:1115883
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Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationAvailable from: 2017-06-27 Created: 2017-06-27 Last updated: 2017-11-29Bibliographically approved

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