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Charge-vortex interplay in a superconducting Coulomb-blockaded island
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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5
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Physical Review B, Volume 92, issue 2, pp. 1-5
Abstract
We show that charge transfer through a small superconducting (S) island of a single-electron transistor is strongly affected by vorticity. This interplay of charge and rotational degrees of freedom in a mesoscopic superconductor occurs through the effect of vorticity on the quantum mechanical spectrum of electron-hole excitations. The subgap quasiparticle levels in vortices can host an extra electron, thus suppressing the so-called parity effect in the S island. We propose to measure the collective dynamics of vorticity and electric charge via the charge pumping effect caused by alternating vortex entry and exit controlled by a periodic magnetic field.
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VK: Low Temperature Laboratory
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Khaymovich, I M, Maisi, V F, Pekola, J P & Mel'nikov, A S 2015, 'Charge-vortex interplay in a superconducting Coulomb-blockaded island', Physical Review B, vol. 92, no. 2, 020501, pp. 1-5. https://doi.org/10.1103/PhysRevB.92.020501