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Coulomb blockade of Cooper pair tunneling and parity effects in the Cooper pair transistor

S. Corlevi·W. Guichard·F. W. J. Hekking·D. B. Haviland
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Abstract

We have measured the Cooper Pair Transistor (CPT) in a tunable electromagnetic environment consisting of four one-dimensional SQUID arrays. The transport properties of the CPT in the high impedance limit, Z_env>>R_Q=6.45~kΩ, are studied for different ratios of the Josephson coupling energy to the charging energy. As the impedance of the environment is increased, the current-voltage characteristic (IVC) of the CPT develops a Coulomb blockade of Cooper pair tunneling and the measured IVCs agree qualitatively with a theory based on quasicharge dynamics for a CPT. Increasing the impedance of the environment induces a transition in the modulation of the IVC with the gate charge from e-periodic to 2e-periodic.

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S. Corlevi, W. Guichard, F. W. J. Hekking, D. B. Haviland. 2006-06-15. Coulomb blockade of Cooper pair tunneling and parity effects in the Cooper pair transistor. https://doi.org/10.1103/physrevb.74.224505

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