Charge-vortex interplay in a superconducting Coulomb-blockaded island

I. M. Khaymovich; V. F. Maisi; J. P. Pekola; A.S. Mel'nikov

doi:10.1103/PhysRevB.92.020501

Charge-vortex interplay in a superconducting Coulomb-blockaded island

I. M. Khaymovich, V. F. Maisi, J. P. Pekola, A.S. Mel'nikov

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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.

Original language	English
Article number	020501
Pages (from-to)	1-5
Number of pages	5
Journal	Physical Review B
Volume	92
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.92.020501
Publication status	Published - 6 Jul 2015
MoE publication type	A1 Journal article-refereed

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10.1103/PhysRevB.92.020501

PhysRevB.92Final published version, 268 KB

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title = "Charge-vortex interplay in a superconducting Coulomb-blockaded island",

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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AU - Maisi, V. F.

AU - Pekola, J. P.

AU - Mel'nikov, A.S.

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Y1 - 2015/7/6

N2 - 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.

AB - 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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Charge-vortex interplay in a superconducting Coulomb-blockaded island

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Centre of Excellence in Low Temperature Quantum Phenomena and Devices

OtaNano – Low Temperature Laboratory

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Charge-vortex interplay in a superconducting Coulomb-blockaded island

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Centre of Excellence in Low Temperature Quantum Phenomena and Devices

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OtaNano – Low Temperature Laboratory

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