Quantum phase transition and Coulomb blockade with one-dimensional SQUID arrays |
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| Institution: | 1. Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology (KIST), Hwarang-ro 14-gil 5, Seongbuk-gu, 136-791 Seoul, South Korea;2. School of Electrical Engineering, Korea University, Anam-dong 5-ga, Seongbuk-gu, 136-713 Seoul, South Korea |
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| Abstract: | We report on experiments with one-dimensional (1D) arrays of small-capacitance superconducting quantum interference devices (SQUIDs), where an external magnetic field can be used to tune in situ the Josephson coupling between neighboring superconducting electrodes. We have studied the superconductor–insulator transition in such arrays, and have also used these arrays to bias a single Josephson junction. In the later experiment, we have observed a clear Coulomb blockade of Cooper-pair tunnelling (CBCPT) in the single junction. |
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