Improving the coherence of superconducting qubits is a fundamental step towards realization fault-tolerant quantum computation. However, times circuits made from conventional aluminium-based Josephson junctions are limited by presence microscopic two-level systems in amorphous aluminum oxide tunnel barriers. Here, we have developed based on NbN/AlN/NbN epitaxial silicon substrates which promise...

Ion Beam Implantation Aluminium nitride (AlN) is central to a range of RF filter and resonators at the heart 5G technologies. Under suitable conditions, as shown by Holger Fiedler, John Kennedy co-workers in article number 2100358, piezoelectric modulus epitaxial AlN increases ion beam implantation noble gases. This effect originates from finite volume deformed with giant piezoelectricity; stab...