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  Substrate-determined exchange interactions between an STM tip and an adatom

Tao, K., Yu, Y., Zhang, W., Jia, C., Xue, D., & Stepanyuk, V. S. (2018). Substrate-determined exchange interactions between an STM tip and an adatom. Physical Review B, 97(22): 224411. doi:10.1103/PhysRevB.97.224411.

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PhysRevB.97.224411.pdf (Publisher version), 891KB
 
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https://doi.org/10.1103/PhysRevB.97.224411 (Publisher version)
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 Creators:
Tao, Kun1, Author
Yu, Yinye2, Author
Zhang, Wenxuan2, Author
Jia, Chenglong2, Author
Xue, Desheng2, Author
Stepanyuk, V. S.1, Author              
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1Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              
2External Organizations, ou_persistent22              

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 Abstract: By performing ab initio calculations, we reveal an unexpected behavior of the exchange interactions between the Fe STM tip and the Fe adatom on Cu(001) and on a Cu2N monolayer on Cu(001) surfaces [denoted as Cu2N/Cu(001)]. A tip-adatom distance-dependent antiferromagnetic-ferromagnetic transition and antiferromagnetic exchange interactions between the tip and the adatom are found for these two junctions, respectively. We demonstrate that the different exchange interactions in these systems are determined by the competition between the tip-adatom and the adatom-substrate interactions. Based on transport calculations, we found that the spin polarization and magnetoresistance in the junction on the Cu(001) system and on the Cu2N/Cu(001) system depend on the tip-adatom distance.

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 Dates: 2018-06-122018-06-01
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: P13247
DOI: 10.1103/PhysRevB.97.224411
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 97 (22) Sequence Number: 224411 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008