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  Three-dimensional superconductors with hybrid higher-order topology

Bultinck, N., Bernevig, B. A., & Zaletel, M. P. (2019). Three-dimensional superconductors with hybrid higher-order topology. Physical Review B, 99(12): 125149. doi:10.1103/PhysRevB.99.125149.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-126F-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-4F9C-0
Genre: Journal Article

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PhysRevB.99.125149.pdf (Publisher version), 616KB
 
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https://doi.org/10.1103/PhysRevB.99.125149 (Publisher version)
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Bultinck, Nick1, Author
Bernevig, B. Andrei2, Author
Zaletel, Michael P.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: We consider three-dimensional superconductors in class DIII with a fourfold rotation axis and inversion symmetry. It is shown that such systems can exhibit higher-order topology with helical Majorana hinge modes. In the case of even-parity superconductors, we show that higher-order topological superconductors can be obtained by adding a small pairing with the appropriate C4 symmetry implementation to a topological insulator. We also show that a hybrid case is possible, where Majorana surface cones resulting from nontrivial strong topology coexist with helical hinge modes. We propose a bulk invariant detecting this hybrid scenario, and numerically analyze a tight binding model exhibiting both Majorana cones and hinge modes.

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 Dates: 2019-03-262019-03-15
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13756
DOI: 10.1103/PhysRevB.99.125149
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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: 99 (12) Sequence Number: 125149 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008