Current-phase relation and Josephson inductance in a superconducting Cooper-pair transistor

A. Paila; D. Gunnarsson; J. Sarkar; M. A. Sillanpää; P. J. Hakonen

doi:10.1103/PhysRevB.80.144520

Current-phase relation and Josephson inductance in a superconducting Cooper-pair transistor

A. Paila, D. Gunnarsson, J. Sarkar, M. A. Sillanpää, P. J. Hakonen

Aalto University

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We have investigated the Josephson inductance LJ of a superconducting Cooper pair transistor (SCPT). We traced the inductance using microwave reflection measurements on a tuned resonance circuit in which a SCPT was mounted in parallel to a □200pH strip line inductance. When the inverse of the Josephson inductance, determined on the charge-phase bias plane for a SCPT with a Josephson to Coulomb energy ratio of EJ / EC =1.75, is integrated over the phase, we obtain a current-phase relation, which is strongly nonsinusoidal near the charge degeneracy point.

Original language	English
Article number	144520
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.80.144520
Publication status	Published - 21 Oct 2009
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.144520

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abstract = "We have investigated the Josephson inductance LJ of a superconducting Cooper pair transistor (SCPT). We traced the inductance using microwave reflection measurements on a tuned resonance circuit in which a SCPT was mounted in parallel to a □200pH strip line inductance. When the inverse of the Josephson inductance, determined on the charge-phase bias plane for a SCPT with a Josephson to Coulomb energy ratio of EJ / EC =1.75, is integrated over the phase, we obtain a current-phase relation, which is strongly nonsinusoidal near the charge degeneracy point.",

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AU - Gunnarsson, D.

AU - Sarkar, J.

AU - Sillanpää, M. A.

AU - Hakonen, P. J.

PY - 2009/10/21

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N2 - We have investigated the Josephson inductance LJ of a superconducting Cooper pair transistor (SCPT). We traced the inductance using microwave reflection measurements on a tuned resonance circuit in which a SCPT was mounted in parallel to a □200pH strip line inductance. When the inverse of the Josephson inductance, determined on the charge-phase bias plane for a SCPT with a Josephson to Coulomb energy ratio of EJ / EC =1.75, is integrated over the phase, we obtain a current-phase relation, which is strongly nonsinusoidal near the charge degeneracy point.

AB - We have investigated the Josephson inductance LJ of a superconducting Cooper pair transistor (SCPT). We traced the inductance using microwave reflection measurements on a tuned resonance circuit in which a SCPT was mounted in parallel to a □200pH strip line inductance. When the inverse of the Josephson inductance, determined on the charge-phase bias plane for a SCPT with a Josephson to Coulomb energy ratio of EJ / EC =1.75, is integrated over the phase, we obtain a current-phase relation, which is strongly nonsinusoidal near the charge degeneracy point.

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Current-phase relation and Josephson inductance in a superconducting Cooper-pair transistor

Abstract

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