Vector substrate-based Josephson junctions

Author:

Wu Yu-Jung1ORCID,Hack Martin2ORCID,Wurster Katja2ORCID,Koch Simon2ORCID,Kleiner Reinhold2ORCID,Koelle Dieter2ORCID,Mannhart Jochen1ORCID,Harbola Varun1ORCID

Affiliation:

1. Max Planck Institute for Solid State Research 1 Heisenbergstrasse 1, 70569 Stuttgart, Germany

2. Physikalisches Institut, Center for Quantum Science (CQ) and LISA+ Universität Tübingen 2 , auf der Morgenstelle 14, 72076 Tübingen, Germany

Abstract

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.

Funder

European Commission

Publisher

AIP Publishing

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