Description
Carbon nanotubes (CNTs) provide a unique one-dimensional platform for investigating mesoscopic superconductivity in quantum conductors. When contacted by superconducting electrodes, CNTs form Josephson junctions with only a few spin-degenerate transport channels, making them an ideal system to probe superconducting phenomena at the microscopic level. However, despite this promise, the reliable integration of CNTs into superconducting circuits remains challenging, mainly because standard fabrication processes can introduce contamination and disorder that degrade device quality.
In this poster, we present our approach for fabricating ultra-clean CNT-based superconducting devices. Our work addresses an open challenge in the field: how to preserve the intrinsic properties of CNTs while embedding them in superconducting circuits.
Transport measurements demonstrate the realization of high-quality CNT Josephson junctions. These measurements establish the viability of ultra-clean CNTs as a platform for gate-tunable superconducting transport and microscopic Andreev physics. In the longer term, this platform may also enable studies of non-local Josephson effects in an ideal one-dimensional conductor. More broadly, this work supports the development of hybrid superconducting circuits based on clean quantum materials, a direction recently highlighted by the demonstration of a carbon nanotube gatemon qubit.
| I am the presenting author | Yes |
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