2026-06-29T21:37:45Z https://archive.materialscloud.org/oai2d

oai:materialscloud.org:2360 2024-10-28T09:57:56Z openaire_data community-mcarchive

Jalil, Abdur Rehman Rüßmann, Philipp Jalil, Abdur Rehman Schmitt, Tobias W. Rüßmann, Philipp Wei, Xian-Kui Frohn, Benedikt Schleenvoigt, Michael Wittl, Wilhelm Hou, Xiao Schmidt, Anne Underwood, Kaycee Bihlmayer, Gustav Luysberg, Martina Mayer, Joachim Blügel, Stefan Grützmacher, Detlev Schüffelgen, Peter 2024-10-28 Proximity-induced superconductivity in hybrid devices of topological insulators and superconductors offers a promising platform for the pursuit of elusive topological superconductivity and its anticipated applications, such as fault-tolerant quantum computing. To study and harness such hybrid devices, a key challenge is the realization of highly functional material interfaces with a suitable superconductor featuring 2e-periodic parity-conserving transport to ensure a superconducting hard-gap free of unpaired electrons, which is important for Majorana physics. A superconductor well-known for this characteristic is Al, however, its direct integration into devices based on tetradymite topological insulators has so far been found to yield non-transparent interfaces. By focusing on Bi₂Te₃-Al heterostructures, this study identifies detrimental interdiffusion processes at the interface through atomically resolved structural and chemical analysis, and showcase their mitigation by leveraging different interlayers – namely Nb, Ti, Pd, and Pt – between Bi₂Te₃ and Al. Through structural transformation of the interlayer materials (X) into their respective tellurides (XTe₂) atomically-sharp epitaxial interfaces are engineered and further characterized in low-temperature transport experiments on Al-X-Bi₂Te₃-X-Al Josephson junctions and in complementary density functional theory calculations. By demonstrating functional interfaces between Bi₂Te₃ and Al, this work provides key insights and paves the way for the next generation of sophisticated topological devices. application/octet-stream application/octet-stream application/octet-stream text/markdown text/markdown text/plain application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/prs.xsf+xml application/zip text/x-python https://doi.org/10.24435/materialscloud:w3-3c oai:materialscloud.org:2360 mcid:2024.174 eng Materials Cloud https://doi.org/10.5281/zenodo.3628251 https://doi.org/10.1038/s41524-020-00482-5 https://doi.org/10.5281/zenodo.7284739 https://doi.org/10.1103/PhysRevB.105.125143 https://doi.org/10.5281/zenodo.7576163 https://renkulab.io/projects/new?data=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 https://archive.materialscloud.org/communities/mcarchive https://doi.org/10.24435/materialscloud:m1-7c info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode topological superconductivity superconductors epitaxial interfaces interface engineering Majorana platform hybrid devices Josephson junctions TMDC topological insulator topological materials JuKKR FLEUR DFT Engineering epitaxial interfaces for topological insulator – superconductor hybrid devices with Al electrodes info:eu-repo/semantics/other