Josephson junctions based on ultraclean carbon nanotubes
S. Annabi, E. Arrighi, A. Peugeot, H. Riechert, J. Griesmar, K. Watanabe, T. Taniguchi, L. Bretheau, J.-D. Pillet
DOI 10.1103/PhysRevApplied.22.064035 · Physical Review Applied
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Abstract
We present a technique for integrating ultraclean carbon nanotubes into superconducting circuits, aiming to realize Josephson junctions based on one-dimensional elementary quantum conductors. This technique primarily involves depositing a nanotube in the final step, thus preserving it from the inherent contaminations of nanofabrication and maintaining contact solely with superconducting electrodes and a crystalline hexagonal boron nitride substrate. Through transport measurements performed in both the normal and superconducting states, we demonstrate that our method yields high-quality junctions with Josephson energies suitable for quantum device applications, such as carbon nanotube-based superconducting qubits.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | onset |
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