Josephson effect through YBa2Cu3 O7-δ /Au-encapsulated nanogaps

Reza Baghdadi, Simon Abay, Dmitri Golubev, Thilo Bauch, Floriana Lombardi*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
114 Downloads (Pure)

Abstract

We successfully fabricated and studied planar superconductor-normal-superconductor (SNS) Josephson junctions made of YBa2Cu3O7-δ (YBCO) high-TC superconductor (S) and Au normal metal (N). The crucial step in fabrication was done by using a Pt/Au bilayer encapsulation of the patterned YBCO nanogap. This procedure preserves the YBCO nanogap from the degradation due to the contact with resists, water, and chemicals involved in further processing for hybrid devices. The junctions exhibit Fraunhofer-like modulation patterns and Shapiro steps when they are irradiated by a rf field. Furthermore, we analyzed the IC(T) characteristics of our hybrid junctions employing a SINI′S (superconductor-insulator-normal conductor-insulator-superconductor) model.

Original languageEnglish
Article number174510
Pages (from-to)1-6
JournalPhysical Review B
Volume95
Issue number17
DOIs
Publication statusPublished - 17 May 2017
MoE publication typeA1 Journal article-refereed

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