Preserving the Josephson Coupling of Twisted Cuprate Junctions via Tailored Silicon Nitride Circuits Boards
arXiv:2511.16241 · doi:10.1002/smll.202506520
Abstract
Controlled fabrication of twisted van der Waals heterostructures is essential to unlock the full potential of moire materials. However, achieving reproducibility remains a major challenge, particularly for air-sensitive materials such as (BSCCO), where it is crucial to preserve the intrinsic and delicate superconducting properties of the interface throughout the entire fabrication process. Here, we present a dry, inert and cryogenic assembly method that combines silicon nitride nanomembranes (NMBs) with pre-patterned electrodes and the cryogenic stacking technique (CST) to fabricate high-quality twisted BSCCO Josephson junctions (JJs). This protocol prevents thermal and chemical degradation during both interface formation and electrical contact integration. We also find that asymmetric membrane designs, such as a double cantilever, effectively suppress vibration-induced disorder due to wire bonding, resulting in sharp and hysteretic current-voltage characteristics. The junctions exhibit a twist-angle-dependent Josephson coupling with magnitudes comparable to the highest-performing devices reported to date, but achieved through a straightforward and versatile contact method, offering a scalable and adaptable platform for future applications. These findings highlight the importance of both interface and contact engineering in addressing reproducibility in superconducting van der Waals heterostructures.
References in corpus (22)
- Two Dimensional Atomic Crystals
- Inhomogeneity of charge density wave order and quenched disorder in a high Tc superconductor
- Scale-free structural organization of oxygen interstitials in La2CuO4+y
- Evolution and Control of Oxygen Order in a Cuprate Superconductor
- Ultra-clean assembly of van der Waals heterostructures
- Sign reversing Hall effect in atomically thin high temperature superconductors
- High-temperature Josephson diode
- The c-axis transport in naturally-grown BiSrCaCuO cross-whisker junctions
- Large Bi-2212 single crystal growth by the floating-zone technique
- Stability of exfoliated BiSrDyCaCuO studied by Raman microscopy
- Gaussian Tunneling Model of c-Axis Twist Josephson Junctions
- Suppressed Superconductivity of the Surface Conduction Layer in BiSrCaCuO Single Crystals Probed by {\it c}-Axis Tunneling Measurements
- Encapsulating high-temperature superconducting twisted van der Waals heterostructures blocks detrimental effects of disorder
- Twisted cuprate van der Waals heterostructures with controlled Josephson coupling
- Persistent Josephson tunneling between BiSrCaCuO flakes twisted by 45 across the superconducting dome
- Inhomogeneity-Induced Time-Reversal Symmetry Breaking in Cuprate Twist-Junctions
- Prominent Josephson tunneling between twisted single copper oxide planes of BiSrLaxCuO
- 2D high temperature superconductor integration in contact printed circuit boards
- Relevant energy scale in hybrid mesoscopic Josephson junctions
- Josephson effects in twisted nodal superconductors
- Pick-up and assembling of chemically sensitive van der Waals heterostructures using dry cryogenic exfoliation
- Hall-effect in the MnBi_2Te_4 crystal using silicon nitride nanomembrane via contacts