Journal article

Simulating the fabrication of aluminium oxide tunnel junctions

MJ Cyster, JS Smith, N Vogt, G Opletal, SP Russo, JH Cole



Aluminium oxide (AlOx) tunnel junctions are important components in a range of nanoelectric devices including superconducting qubits where they can be used as Josephson junctions. While many improvements in the reproducibility and reliability of qubits have been made possible through new circuit designs, there are still knowledge gaps in the relevant materials science. A better understanding of how fabrication conditions affect the density, uniformity, and elemental composition of the oxide barrier may lead to the development of lower noise and more reliable nanoelectronics and quantum computers. In this paper, we use molecular dynamics to develop models of Al–AlOx–Al junctions by iterativel..

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University of Melbourne Researchers


Awarded by Australian Research Council

Funding Acknowledgements

The authors acknowledge support of the Australian Research Council through grants DP140100375, CE170100026 (M.J.C.), and CE170100039 (J.S.S.). The authors also acknowledge useful discussions with P. Delsing, S. Fritz, J. Gale, D. Gerthsen, N. Katz, E. Olsson, J. Pekola, and L. Zeng. This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government. The authors acknowledge the people of the Woi wurrung and Boon wurrung language groups of the eastern Kulin Nations on whose unceded lands we work. We also acknowledge the Ngunnawal people, the Traditional Custodians of the Australian Capital Territory where NCI is located. We respectfully acknowledge the Traditional Custodians of the lands and waters across Australia and their Elders: past, present, and emerging.