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Voltage-Induced Switching Dynamics of a Coupled Spin Pair in a Molecular Junction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
2016 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 16, no 4, p. 2824-2829Article in journal (Refereed) Published
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Text
Abstract [en]

Molecular spintronics is made possible by the coupling between electronic configuration and magnetic polarization of the molecules. For control and application of the individual molecular states, it is necessary to both read and write their spin states. Conventionally, this is achieved by means of external magnetic fields or ferromagnetic contacts, which may change the intentional spin state and may present additional challenges when downsizing devices. Here, we predict that coupling magnetic molecules together opens up possibilities for all electrical control of both the molecular spin states as well as the current flow through the system. By tuning between the regimes of ferromagnetic and antiferromagnetic exchange interaction, the current can be at least an order of magnitude enhanced or reduced. The effect is susceptible to the tunnel coupling and molecular level alignment that can be used to achieve current rectification.

Place, publisher, year, edition, pages
2016. Vol. 16, no 4, p. 2824-2829
Keywords [en]
Magnetic molecules, voltage-induced switching magnetic exchange interaction, rectification
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-296870DOI: 10.1021/acs.nanolett.6b00628ISI: 000374274600105PubMedID: 27010805OAI: oai:DiVA.org:uu-296870DiVA, id: diva2:940117
Available from: 2016-06-20 Created: 2016-06-20 Last updated: 2017-11-28Bibliographically approved

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Hammar, HenningFransson, Jonas

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