Superconductivity in type-II Weyl-semimetal WTe2 induced by a normal metal contact

Kononov, Artem and Endres, Martin and Abulizi, Gulibusitan and Qu, Kejian and Yan, Jiaqiang and Mandrus, David G. and Watanabe, Keny and Taniguchi, Takashi and Schönenberger, Christian . (2021) Superconductivity in type-II Weyl-semimetal WTe2 induced by a normal metal contact. Journal of Applied Physics, 129 (11). p. 113903.

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Official URL: https://edoc.unibas.ch/86346/

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WTe2 is a material with rich topological properties: it is a 2D topological insulator as a monolayer and a Weyl-semimetal and higher-order topological insulator in the bulk form. Inducing superconductivity in topological materials is a way to obtain topological superconductivity, which lays at the foundation for many proposals of fault tolerant quantum computing. Here, we demonstrate the emergence of superconductivity at the interface between WTe2 and the normal metal palladium. The superconductivity has a critical temperature of about 1.2 K. By studying the superconductivity in perpendicular magnetic field, we obtain the coherence length and the London penetration depth. These parameters correspond to a low Fermi velocity and a high density of states at the Fermi level. This hints to a possible origin of superconductivity due to the formation of flatbands. Furthermore, the critical in-plane magnetic field exceeds the Pauli limit, suggesting a non-trivial nature of the superconducting state.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Kononov, Artem and Endres, Martin Alexander and Abulizi, Gulibusitan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Apr 2022 14:14
Deposited On:07 Apr 2022 14:14

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