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Electric control of a {Fe4} single-molecule magnet in a single-electron transistor
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. Lunds universitet.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.ORCID iD: 0000-0003-4489-7561
US DOE, Off Basic Energy Sci, Washington, DC 20585 USA.
2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 88, no 22, p. Article ID: 224423-Article in journal (Refereed) Published
Abstract [en]

Using first-principles methods, we study theoretically the properties of an individual {Fe-4} single-molecule magnet (SMM) attached to metallic leads in a single-electron transistor geometry. We show that the conductive leads do not affect the spin ordering and magnetic anisotropy of the neutral SMM. On the other hand, the leads have a strong effect on the anisotropy of the charged states of the molecule, which are probed in Coulomb blockade transport. Furthermore, we demonstrate that an external electric potential, modeling a gate electrode, can be used to manipulate the magnetic properties of the system. For a charged molecule, by localizing the extra charge with the gate voltage closer to the magnetic core, the anisotropy magnitude and spin ordering converges to the values found for the isolated {Fe-4} SMM. We compare these findings with the results of recent quantum transport experiments in three-terminal devices.

Place, publisher, year, edition, pages
2013. Vol. 88, no 22, p. Article ID: 224423-
National Category
Physical Sciences
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-33310DOI: 10.1103/PhysRevB.88.224423ISI: 000331753300006Scopus ID: 2-s2.0-84892423956OAI: oai:DiVA.org:lnu-33310DiVA, id: diva2:708151
Available from: 2014-03-26 Created: 2014-03-26 Last updated: 2017-12-05Bibliographically approved

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Nossa, JavierIslam, FhokrulCanali, Carlo M.

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