Vector substrate-based Josephson junctions

We present a way to fabricate bicrystal Josephson junctions of high-Tc cuprate superconductors that are not grown on bulk bicrystalline substrates. Based on vector substrate technology, this approach makes use of a few tens-of-nanometer-thick bicrystalline membranes transferred onto conventional sub...

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Bibliographic Details
Published in:Applied physics letters 2024-07, Vol.125 (3)
Main Authors: Wu, Yu-Jung, Hack, Martin, Wurster, Katja, Koch, Simon, Kleiner, Reinhold, Koelle, Dieter, Mannhart, Jochen, Harbola, Varun
Format: Article
Language:English
Subjects:
Bicrystals
Film growth
Josephson junctions
Membranes
Sapphire
Single crystals
Substrates
Superconductors
Thin films
YBCO superconductors
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Summary:We present a way to fabricate bicrystal Josephson junctions of high-Tc cuprate superconductors that are not grown on bulk bicrystalline substrates. Based on vector substrate technology, this approach makes use of a few tens-of-nanometer-thick bicrystalline membranes transferred onto conventional substrates. We demonstrate 24° [001]-tilt YBa2Cu3O7−x Josephson junctions fabricated on sapphire single crystals by utilizing 10-nm-thick bicrystalline SrTiO3 membranes. This technique allows one to manufacture bicrystalline Josephson junctions of high-Tc superconductors on a large variety of bulk substrate materials, providing distinctive degrees of freedom in designing the junctions and their electronic properties. Furthermore, it offers the capability to replace the fabrication of bulk bicrystalline substrates with thin-film growth methods.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0217861