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  Dynamical Negative Differential Resistance in Antiferromagnetically Coupled Few-Atom Spin Chains

Rolf-Pissarczyk, S., Yan, S., Malavolti, L., Burgess, J. A. J., McMurtrie, G., & Loth, S. (2017). Dynamical Negative Differential Resistance in Antiferromagnetically Coupled Few-Atom Spin Chains. Physical Review Letters, 119(21): 217201. doi:10.1103/PhysRevLett.119.217201.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-98BB-1 Version Permalink: https://hdl.handle.net/21.11116/0000-0004-8FE2-C
Genre: Journal Article

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PhysRevLett.119.217201.pdf (Publisher version), 431KB
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https://dx.doi.org/10.1103/PhysRevLett.119.217201 (Publisher version)
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https://arxiv.org/abs/1712.04213 (Preprint)
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 Creators:
Rolf-Pissarczyk, S.1, 2, Author           
Yan, S.1, 2, 3, Author           
Malavolti, L.1, 2, Author           
Burgess, J. A. J.1, 2, 4, Author           
McMurtrie, G.1, 2, Author           
Loth, S.1, 2, 5, Author           
Affiliations:
1Dynamics of Nanoelectronic Systems, Independent Research Groups, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938290              
2Max Planck Institute for Solid State Research, ou_persistent22              
3School of Physical Science and Technology, Shanghai Tech University, ou_persistent22              
4Department of Physics and Astronomy, University of Manitoba, Winnipeg, ou_persistent22              
5University of Stuttgart - Institute for Functional Matter and Quantum Technologies, ou_persistent22              

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 Abstract: We present the appearance of negative differential resistance (NDR) in spin-dependent electron transport through a few-atom spin chain. A chain of three antiferromagnetically coupled Fe atoms (Fe trimer) was positioned on a Cu2N/Cu(100) surface and contacted with the spin-polarized tip of a scanning tunneling microscope, thus coupling the Fe trimer to one nonmagnetic and one magnetic lead. Pronounced NDR appears at the low bias of 7 mV, where inelastic electron tunneling dynamically locks the atomic spin in a long-lived excited state. This causes a rapid increase of the magnetoresistance between the spin-polarized tip and Fe trimer and quenches elastic tunneling. By varying the coupling strength between the tip and Fe trimer, we find that in this transport regime the dynamic locking of the Fe trimer competes with magnetic exchange interaction, which statically forces the Fe trimer into its high-magnetoresistance state and removes the NDR.

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Language(s): eng - English
 Dates: 2017-10-022017-03-182017-11-212017-11-21
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.119.217201
arXiv: 1712.04213
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Project name : The authors thank E. Weckert and H. Dosch (Deutsches Elektronen-Synchrotron, Germany) for providing lab space. This project has received funding from the European Research Council (ERC) under the European Union ’ s Horizon 2020 research and innovation program (ERC-2014-StG-633818-dasQ). S. R.-P. acknowledges a fellowship from the Studienstiftung des deutschen Volkes (German Academic Scholarship Foundation) and J. A. J. B. postdoctoral fellowships from the Alexander von Humboldt foundation and the Natural Sciences and Engineering Research Council of Canada.
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 119 (21) Sequence Number: 217201 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1