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Superconducting quantum interference devices with graphene junctions

Research output: Contribution to Journal/Magazine › Meeting abstract

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Superconducting quantum interference devices with graphene junctions. / Thompson, Michael; Prance, Jonathan; Haley, Richard et al.
In: APS March Meeting 2017, 2017.

Research output: Contribution to Journal/Magazine › Meeting abstract

Harvard

Thompson, M, Prance, J, Haley, R, Pashkin, Y, Ben Shalom, M, Fal'Ko, V, Matthews, A, White, J, Viznichenko, R & Melhem, Z 2017, 'Superconducting quantum interference devices with graphene junctions', APS March Meeting 2017. <http://adsabs.harvard.edu/abs/2017APS..MARY31012T>

APA

Thompson, M., Prance, J., Haley, R., Pashkin, Y., Ben Shalom, M., Fal'Ko, V., Matthews, A., White, J., Viznichenko, R., & Melhem, Z. (2017). Superconducting quantum interference devices with graphene junctions. APS March Meeting 2017. http://adsabs.harvard.edu/abs/2017APS..MARY31012T

Vancouver

Thompson M, Prance J, Haley R, Pashkin Y, Ben Shalom M, Fal'Ko V et al. Superconducting quantum interference devices with graphene junctions. APS March Meeting 2017. 2017.

Author

Thompson, Michael ; Prance, Jonathan ; Haley, Richard et al. / Superconducting quantum interference devices with graphene junctions. In: APS March Meeting 2017. 2017.

Bibtex

@article{c2d50974cb164cf09d4f789e3fffac9e,
title = "Superconducting quantum interference devices with graphene junctions",
abstract = "We present measurements of DC superconducting quantum interference devices based on Nb/graphene/Nb Josephson junctions. The superconducting proximity effect in graphene can be used to build Josephson junctions whose critical current can be controlled by field-effect gates. These junctions combine the tunability of semiconductor Josephson junctions with the high critical currents and low contact resistances of metal SNS junctions. By using local gates, the SQUID junction critical currents can be modified individually and this allows the sensitivity and symmetry of the SQUID to be controlled in-situ. We compare the critical current of the SQUID with simulations that include a non-sinusoidal current phase relation in the junctions, as expected for ballistic graphene junctions. We also investigate the transfer function of the device in both symmetric and asymmetric configurations and find a highest transfer function of 300 μV/Φ0. Graphene Josephson junctions have the potential to add functionality to existing technologies; for example, to make SQUID magnetometers with tunable sensitivity or superconducting qubits with fast electrical control.",
author = "Michael Thompson and Jonathan Prance and Richard Haley and Yuri Pashkin and {Ben Shalom}, Moshe and Vladimir Fal'Ko and Anthony Matthews and Jeremy White and Roman Viznichenko and Ziad Melhem",
year = "2017",
language = "English",
journal = "APS March Meeting 2017",

}

RIS

TY - JOUR

T1 - Superconducting quantum interference devices with graphene junctions

AU - Thompson, Michael

AU - Prance, Jonathan

AU - Haley, Richard

AU - Pashkin, Yuri

AU - Ben Shalom, Moshe

AU - Fal'Ko, Vladimir

AU - Matthews, Anthony

AU - White, Jeremy

AU - Viznichenko, Roman

AU - Melhem, Ziad

PY - 2017

Y1 - 2017

N2 - We present measurements of DC superconducting quantum interference devices based on Nb/graphene/Nb Josephson junctions. The superconducting proximity effect in graphene can be used to build Josephson junctions whose critical current can be controlled by field-effect gates. These junctions combine the tunability of semiconductor Josephson junctions with the high critical currents and low contact resistances of metal SNS junctions. By using local gates, the SQUID junction critical currents can be modified individually and this allows the sensitivity and symmetry of the SQUID to be controlled in-situ. We compare the critical current of the SQUID with simulations that include a non-sinusoidal current phase relation in the junctions, as expected for ballistic graphene junctions. We also investigate the transfer function of the device in both symmetric and asymmetric configurations and find a highest transfer function of 300 μV/Φ0. Graphene Josephson junctions have the potential to add functionality to existing technologies; for example, to make SQUID magnetometers with tunable sensitivity or superconducting qubits with fast electrical control.

AB - We present measurements of DC superconducting quantum interference devices based on Nb/graphene/Nb Josephson junctions. The superconducting proximity effect in graphene can be used to build Josephson junctions whose critical current can be controlled by field-effect gates. These junctions combine the tunability of semiconductor Josephson junctions with the high critical currents and low contact resistances of metal SNS junctions. By using local gates, the SQUID junction critical currents can be modified individually and this allows the sensitivity and symmetry of the SQUID to be controlled in-situ. We compare the critical current of the SQUID with simulations that include a non-sinusoidal current phase relation in the junctions, as expected for ballistic graphene junctions. We also investigate the transfer function of the device in both symmetric and asymmetric configurations and find a highest transfer function of 300 μV/Φ0. Graphene Josephson junctions have the potential to add functionality to existing technologies; for example, to make SQUID magnetometers with tunable sensitivity or superconducting qubits with fast electrical control.

M3 - Meeting abstract

JO - APS March Meeting 2017

JF - APS March Meeting 2017

ER -