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Couëdo F, Amari P, Feuillet-Palma C, Ulysse C, Srivastava YK, Singh R, Bergeal N, Lesueur J. Dynamic properties of high-T c superconducting nano-junctions made with a focused helium ion beam. Sci Rep 2020; 10:10256. [PMID: 32581302 PMCID: PMC7314811 DOI: 10.1038/s41598-020-66882-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 05/28/2020] [Indexed: 11/09/2022] Open
Abstract
The Josephson junction (JJ) is the corner stone of superconducting electronics and quantum information processing. While the technology for fabricating low Tc JJ is mature and delivers quantum circuits able to reach the "quantum supremacy", the fabrication of reproducible and low-noise high-Tc JJ is still a challenge to be taken up. Here we report on noise properties at RF frequencies of recently introduced high-Tc Josephson nano-junctions fabricated by mean of a Helium ion beam focused at sub-nanometer scale on a YBa2Cu3O7 thin film. We show that their current-voltage characteristics follow the standard Resistively-Shunted-Junction (RSJ) circuit model, and that their characteristic frequency fc = (2e/h)IcRn reaches ~300 GHz at low temperature. Using the "detector response" method, we evidence that the Josephson oscillation linewidth is only limited by the thermal noise in the RSJ model for temperature ranging from T ~ 20 K to 75 K. At lower temperature and for the highest He irradiation dose, the shot noise contribution must also be taken into account when approaching the tunneling regime. We conclude that these Josephson nano-junctions present the lowest noise level possible, which makes them very promising for future applications in the microwave and terahertz regimes.
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Affiliation(s)
- François Couëdo
- Laboratoire de Physique et d'Etude des Matériaux, CNRS, ESPCI Paris, PSL Research University, UPMC, 75005, Paris, France
- Laboratoire National de Métrologie et d'Essais (LNE), Quantum Electrical Metrology Department, Avenue Roger Hennequin, 78197, Trappes, France
| | - Paul Amari
- Laboratoire de Physique et d'Etude des Matériaux, CNRS, ESPCI Paris, PSL Research University, UPMC, 75005, Paris, France
| | - Cheryl Feuillet-Palma
- Laboratoire de Physique et d'Etude des Matériaux, CNRS, ESPCI Paris, PSL Research University, UPMC, 75005, Paris, France
| | - Christian Ulysse
- Centre de Nanosciences et de Nanotechnologie, CNRS, Université Paris Saclay, 91120, Palaiseau, France
| | - Yogesh Kumar Srivastava
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
- Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Ranjan Singh
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
- Centre for Disruptive Photonic Technologies, The Photonics Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Nicolas Bergeal
- Laboratoire de Physique et d'Etude des Matériaux, CNRS, ESPCI Paris, PSL Research University, UPMC, 75005, Paris, France
| | - Jérôme Lesueur
- Laboratoire de Physique et d'Etude des Matériaux, CNRS, ESPCI Paris, PSL Research University, UPMC, 75005, Paris, France.
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Alff L, Marx A, Gross R, Beck A, Takashima H, Kashiwaya S, Koyanagi M, Tanaka Y. Tunneling spectroscopy of high-Tc superconductors. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0964-1807(99)00042-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Polyanskii AA, Gurevich A, Pashitski AE, Heinig NF, Redwing RD, Nordman JE, Larbalestier DC. Magneto-optical study of flux penetration and critical current densities in. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:8687-8697. [PMID: 9982382 DOI: 10.1103/physrevb.53.8687] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Doderer T, Zhang YM, Winkler D, Gross R. Imaging of electromagnetic resonances in a YBa2Cu3O7- delta bicrystal grain-boundary Josephson junction. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:93-96. [PMID: 9979578 DOI: 10.1103/physrevb.52.93] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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