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{
"updated": "2024-10-28T08:57:56.283057+00:00",
"id": "2360",
"metadata": {
"publication_date": "Oct 28, 2024, 09:57:56",
"edited_by": 576,
"doi": "10.24435/materialscloud:w3-3c",
"references": [
{
"citation": "A. R. Jalil, T. W. Schmitt, P. R\u00fc\u00dfmann, X.-K. Wei, B. Frohn, M. Schleenvoigt, W. Wittl, X. Hou, A. Schmidt, K. Underwood, G. Bihlmayer, M. Luysberg, J. Mayer, S. Bl\u00fcgel, D. Gr\u00fctzmacher, P. Sch\u00fcffelgen, under review (2024)",
"type": "Preprint",
"comment": "Preprint where the data is discussed"
},
{
"type": "Software",
"url": "",
"citation": "P. R\u00fc\u00dfmann, F. Bertoldo, J. Br\u00f6der, J. Wasmer, R. Mozumder, J. Chico, and S. Bl\u00fcgel, Zenodo (2021)",
"doi": "10.5281/zenodo.3628251",
"comment": "Source code for the AiiDA-KKR plugin"
},
{
"type": "Journal reference",
"citation": "P. R\u00fc\u00dfmann, F. Bertoldo, and S. Bl\u00fcgel, The AiiDA-KKR plugin and its application to high-throughput impurity embedding into a topological insulator. npj Comput Mater 7, 13 (2021)",
"doi": "10.1038/s41524-020-00482-5",
"comment": "AiiDA-KKR method paper"
},
{
"type": "Software",
"citation": "The JuKKR developers, JuDFTteam/JuKKR: v3.6 (v3.6), Zenodo. (2022)",
"doi": "10.5281/zenodo.7284739",
"comment": "Source code of the JuKKR code"
},
{
"type": "Journal reference",
"citation": "P. R\u00fc\u00dfmann and S. Bl\u00fcgel, Phys. Rev. B 105, 125143 (2022)",
"doi": "10.1103/PhysRevB.105.125143",
"comment": "Kohn-Sham Bogoliubov-de Gennes method paper for JuKKR"
},
{
"type": "Software",
"citation": "D. Wortmann et al., FLEUR, Zenodo (2024)",
"doi": "10.5281/zenodo.7576163",
"comment": "Source code of the FLEUR code"
}
],
"description": "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 Bi\u2082Te\u2083-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 \u2013 namely Nb, Ti, Pd, and Pt \u2013 between Bi\u2082Te\u2083 and Al. Through structural transformation of the interlayer materials (X) into their respective tellurides (XTe\u2082) atomically-sharp epitaxial interfaces are engineered and further characterized in low-temperature transport experiments on Al-X-Bi\u2082Te\u2083-X-Al Josephson junctions and in complementary density functional theory calculations. By demonstrating functional interfaces between Bi\u2082Te\u2083 and Al, this work provides key insights and paves the way for the next generation of sophisticated topological devices.",
"contributors": [
{
"email": "a.jalil@fz-juelich.de",
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Abdur Rehman",
"familyname": "Jalil"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Tobias W.",
"familyname": "Schmitt"
},
{
"email": "p.ruessmann@fz-juelich.de",
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-1), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"Institute for Theoretical Physics and Astrophysics, University of W\u00fcrzburg, 97074 W\u00fcrzburg, Germany"
],
"givennames": "Philipp",
"familyname": "R\u00fc\u00dfmann"
},
{
"affiliations": [
"Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons, Forschungszentrum J\u00fclich GmbH, 52425 J\u00fclich, Germany"
],
"givennames": "Xian-Kui",
"familyname": "Wei"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Benedikt",
"familyname": "Frohn"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Michael",
"familyname": "Schleenvoigt"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany"
],
"givennames": "Wilhelm",
"familyname": "Wittl"
},
{
"affiliations": [
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany",
"Central Facility for Electron Microscopy (GFE), RWTH Aachen University, 52074 Aachen, Germany"
],
"givennames": "Xiao",
"familyname": "Hou"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Anne",
"familyname": "Schmidt"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany"
],
"givennames": "Kaycee",
"familyname": "Underwood"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-1), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany"
],
"givennames": "Gustav",
"familyname": "Bihlmayer"
},
{
"affiliations": [
"Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons, Forschungszentrum J\u00fclich GmbH, 52425 J\u00fclich, Germany"
],
"givennames": "Martina",
"familyname": "Luysberg"
},
{
"affiliations": [
"Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons, Forschungszentrum J\u00fclich GmbH, 52425 J\u00fclich, Germany",
"Central Facility for Electron Microscopy (GFE), RWTH Aachen University, 52074 Aachen, Germany"
],
"givennames": "Joachim",
"familyname": "Mayer"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-1), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany"
],
"givennames": "Stefan",
"familyname": "Bl\u00fcgel"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-1), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Detlev",
"familyname": "Gr\u00fctzmacher"
},
{
"affiliations": [
"Peter Gr\u00fcnberg Institute (PGI-9), Forschungszentrum J\u00fclich, 52425 J\u00fclich, Germany",
"JARA-FIT (Fundamentals of Future Information Technology), J\u00fclich-Aachen Research Alliance, Forschungszentrum J\u00fclich and RWTH Aachen University, 52425 J\u00fclich, Germany"
],
"givennames": "Peter",
"familyname": "Sch\u00fcffelgen"
}
],
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"id": "2360",
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"owner": 95,
"license": "Creative Commons Attribution 4.0 International",
"mcid": "2024.174",
"_oai": {
"id": "oai:materialscloud.org:2360"
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"status": "published",
"title": "Engineering epitaxial interfaces for topological insulator \u2013 superconductor hybrid devices with Al electrodes",
"keywords": [
"topological superconductivity",
"superconductors",
"epitaxial interfaces",
"interface engineering",
"Majorana platform",
"hybrid devices",
"Josephson junctions",
"TMDC",
"topological insulator",
"topological materials",
"JuKKR",
"FLEUR",
"DFT"
]
},
"revision": 8,
"created": "2024-09-26T07:38:36.555574+00:00"
}