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

Baghdadi, Reza ; Abay, Simon LU ; Golubev, Dmitri ; Bauch, Thilo and Lombardi, Floriana (2017) In Physical Review B 95(17).
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)... (More)

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.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
95
issue
17
article number
174510
publisher
American Physical Society
external identifiers
  • scopus:85023193947
ISSN
2469-9950
DOI
10.1103/PhysRevB.95.174510
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2017 American Physical Society.
id
dc2f40c2-1b5a-4899-a701-c6df2b3b820f
date added to LUP
2022-03-31 14:21:51
date last changed
2022-04-23 23:15:09
@article{dc2f40c2-1b5a-4899-a701-c6df2b3b820f,
  abstract     = {{<p>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.</p>}},
  author       = {{Baghdadi, Reza and Abay, Simon and Golubev, Dmitri and Bauch, Thilo and Lombardi, Floriana}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{17}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Josephson effect through YBa2Cu3 O7-δ /Au-encapsulated nanogaps}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.95.174510}},
  doi          = {{10.1103/PhysRevB.95.174510}},
  volume       = {{95}},
  year         = {{2017}},
}