Abstract
Abstract In an effort to eliminate the intrinsic noise sources that contained within the superconducting qubit circuits, we successfully fabricate superconducting flux qubit circuits (rf SQUID) with full epitaxially grown NbN/AlN/NbN tunnel junctions. The temperature dependent of magnetic flux shift has been investigated by using a NbN/AlN/NbN dc SQUID magnetometer in the temperature range from 20 mK to 2.5 K. Our results show that the shift of the magnetic flux is in the level of ∼1 mF 0 during the experiment.
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