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  Tuning topological surface magnetism by bulk alloying

Klier, N., Sharma, S., Rost, F., Pankratov, O., & Shallcross, S. (2019). Tuning topological surface magnetism by bulk alloying. Physical Review B, 100(7): 075130. doi:10.1103/PhysRevB.100.075130.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0008-DF85-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-4F44-3
Genre: Journal Article

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PhysRevB.100.075130.pdf (Copyright transfer agreement), 992KB
 
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https://doi.org/10.1103/PhysRevB.100.075130 (Publisher version)
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Klier, N.1, Author
Sharma, S.2, Author
Rost, F.1, Author
Pankratov, O.1, Author
Shallcross, S.1, Author
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1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_2415691              

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 Abstract: Deploying an analytical atomistic model of the bulk band structure of the IV-VI crystalline topological insulators, we connect the spin structure of the surface state to the crystal field and spin-orbit coupling parameters of the bulk material. While the Dirac-Weyl-type topological surface state is often assumed to be universal, we show that the physics of the surface state is strikingly nonuniversal, carrying a profound imprint of the bulk physics. To see this explicitly we calculate the Ruderman-Kittel-Kasuya-Yosida interaction, which may be viewed as a probe of this surface state spin structure, finding that its qualitative form depends on the values the bulk spin-orbit and crystal field parameters take. This opens the way to tune the spin interaction on the surface of a IV-VI topological insulator by, for instance, varying the composition of the IV-VI ternary compounds.

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 Dates: 2019-08-152019-08-15
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13800
DOI: 10.1103/PhysRevB.100.075130
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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: 100 (7) Sequence Number: 075130 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008