Superconducting diode effect in gradiently strained Nb0.5Ti0.5N films
The superconducting diode effect (SDE), combining superconductivity with diode-like nonreciprocal current flow, recently emerges as an ideal candidate for zero-dissipation electronic circuits. Such technologically advantageous diodes are achieved by intricate material engineering to disrupt inversion symmetry, which leads to the production challenges as well as a limited pool of viable materials. Here we exploit the gradient interfacial strain to experimentally induce the SDE in Nb0.5Ti0.5N films grown on MgO substrates. Additionally, the SDE is tunable with an in-plane magnetic field and can be further enhanced by introducing an interfacial anisotropic pinning potential. Our findings establish interfacial strain gradient as a versatile tool for creating and enhancing tunable SDE.
Authors
- Shengyao Li (ORCID: https://orcid.org/0000-0001-7765-8650)
- Xueyan Wang (ORCID: https://orcid.org/0009-0003-5409-9202)
- Ri He (ORCID: https://orcid.org/0000-0001-6874-8574)
- Xiao Renshaw Wang (ORCID: https://orcid.org/0000-0002-5503-9899)
- Yanwei Cao (ORCID: https://orcid.org/0000-0003-1466-6543)
- Liang Wu (ORCID: https://orcid.org/0000-0003-1030-6997)
- Shaoqin Peng (ORCID: https://orcid.org/0000-0003-3178-1404)
- Zherui Yang
- Zhen Wang (ORCID: https://orcid.org/0000-0003-3613-3238)
Institutions
- Kunming University of Science and Technology (CN)
- University of Science and Technology of China (CN)
- Hefei University of Technology (CN)
- Nanyang Technological University (SG)
- Chinese Academy of Sciences (CN)
- Ningbo Institute of Industrial Technology (CN)
Publication Details
- Journal
- Applied Physics Reviews
- Published
- 2025-08-25
- DOI
- https://doi.org/10.1063/5.0270321
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Ministry of Education - Singapore
- National Natural Science Foundation of China