Majorana Kramers Pairs in Higher-Order Topological Insulators

Hsu, Chen-Hsuan and Stano, Peter and Klinovaja, Jelena and Loss, Daniel. (2018) Majorana Kramers Pairs in Higher-Order Topological Insulators. Physical Review Letters, 121 (19). p. 196801.

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Official URL: https://edoc.unibas.ch/67786/

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We propose a tune-free scheme to realize Kramers pairs of Majorana bound states in recently discovered higher-order topological insulators (HOTIs). We show that, by bringing two hinges of a HOTI into the proximity of an s-wave superconductor, the competition between local and crossed Andreev pairing leads to the formation of Majorana Kramers pairs, when the latter pairing dominates over the former. We demonstrate that such a topological superconductivity is stabilized by moderate electron-electron interactions. The proposed setup avoids the application of a magnetic field or local voltage gates, and requires weaker interactions compared with nonhelical nanowires.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Klinovaja, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:16 Oct 2023 10:34
Deposited On:06 Feb 2019 13:33

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