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DFT calculations of the charged states of N@C60 and {\{}Fe4{\}} single molecule magnets investigated in tunneling spectroscopy
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics. (Condensed Matter Theory)
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics. (Condensed Matter Theory)
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics. (Condensed Matter Theory)ORCID iD: 0000-0003-4489-7561
Naval Research Laboratory, Washington DC. (Office of Basic Energy Sciences, U.S. Department of Energy)
2012 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

For device applications of single molecule magnets (SMMs) in high-density information storage and quantum-state control it is essential that the magnetic properties of the molecules remain stable under the influence of metallic contacts or surface environment. Recent tunneling experiments [1, 2] on N@C60 and {\{}Fe4{\}} SMM have shown that these molecules preserve their magnetic characteristics when they are used as the central island of single-electron transistors. Although quantum spin models have been used extensively to study theoretically tunneling spectroscopy of SMMs, it has been shown recently that the orbital degrees of freedom, which is absent in spin models, can significantly affect the tunneling conductance [3]. In this work we present first-principles calculations of the neutral and charged states of N@C60 and {\{}Fe4{\}} SMMs, and discuss a strategy to include their properties into a theory of quantum transport. We also present results of the magnetic anisotropy for the different charge states of Fe4 and discuss their relevance for experiments [2] in the sequential tunneling and cotunnelling regimes.

Place, publisher, year, edition, pages
2012.
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-27945OAI: oai:DiVA.org:lnu-27945DiVA: diva2:639446
Conference
American Physical Society March Meeting 2012
Available from: 2013-08-07 Created: 2013-08-07 Last updated: 2016-11-01Bibliographically approved

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Nossa, JavierIslam, FhokrulCanali, Carlo M.

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  • nn-NO
  • nn-NB
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