Vortex Chains and Vortex Jets in MoSi Microbridges

Volodymyr M. Bevz; Barbora Budinska; Sebastian Lamb-Camarena; Stanislava O. Shpilinska; Clemens Schmid; Mikhail Yu. Mikhailov; Wolfgang Lang; Oleksandr V. Dobrovolskiy

doi:10.1002/pssr.202200513

Vortex Chains and Vortex Jets in MoSi Microbridges

Volodymyr M. Bevz
, Barbora Budinska
, Sebastian Lamb-Camarena
, Stanislava O. Shpilinska
, Clemens Schmid
, Mikhail Yu. Mikhailov
, Wolfgang Lang
, Oleksandr V. Dobrovolskiy (Korresp. Autor*in)

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

Abstract

Superconducting bridges exhibit many properties of a Josephson junction, such as the electromagnetic radiation at overcritical currents ItextgreaterIc and steps in the microwave-irradiated current–voltage (I–V) curves. These Josephson effects stem from the periodic motion of magnetic flux quanta (vortices) in the narrowest region of the bridge. According to the Aslamazov and Larkin (AL) theory, the I–V curve of such a constriction should exhibit voltage kinks each time the number of vortices in the 1D vortex chain is increased by one. However, in the presence of defects and fluctuations, the intervortex repulsion stipulates the formation of a 2D vortex jet, which goes beyond the 1D AL model. Here, by milling one or two slits across a MoSi thin strip, we make vortices to move in a vortex–jet or a vortex–chain fashion, respectively. Unexpectedly, for the strip with a vortex jet, we observe equidistant voltage kinks at transport currents I≃2Ic which are rather far from the assumption of I≈Ic in the AL model. At the moment, we have no explanation for this observation, tending to attribute it to fast relaxation processes in MoSi and looking forward for a comparison with other superconducting materials.

Originalsprache	Englisch
Aufsatznummer	2200513
Seitenumfang	5
Fachzeitschrift	Physica Status Solidi. Rapid Research Letters
Jahrgang	17
Ausgabenummer	11
Frühes Online-Datum	14 Feb. 2023
DOIs	https://doi.org/10.1002/pssr.202200513
Publikationsstatus	Veröffentlicht - Nov. 2023

Fördermittel

The authors are very grateful to Denis Yu. Vodolazov for numerous fruitful discussions. V.M.B. acknowledges the European Cooperation in Science and Technology (E\u2010COST) for support via Grants No. E\u2010COST\u2010GRANT\u2010CA16218\u20105759aa9b and No. E\u2010COST\u2010GRANT\u2010CA16218\u201046e403c7. B.B. and S.L.C. acknowledge financial support by the Vienna Doctoral School in Physics (VDSP). S.L.C. thanks the Austrian Science Fund (FWF) for funding via Grant no. I 4889\u2010N (CurviMag). S.O.S. acknowledges the OeAD (Austria's Agency for Education and Internationalisation) for support through the Ernst Mach Grant MPC\u20102022\u201003823, EM UKR/Batch II. M.Yu.M. acknowledges the Wolfgang Pauli Institute (WPI) Vienna for the scholarship within the framework of the Pauli Ukraine Project, the scholarship from the Krzysztof Skubiszewski Foundation, and the IEEE Magnetics Society for support via the STCU Project no. 9918. This research is funded in whole, or in part, by the Austrian Science Fund (FWF), Grant nos. I 6079\u2010N (FluMag) and I 4865\u2010N (FluxPin). Support by E\u2010COST via COST Actions CA19108 (HiSCALE) and CA21144 (SuperQuMap) is gratefully acknowledged. The authors are very grateful to Denis Yu. Vodolazov for numerous fruitful discussions. V.M.B. acknowledges the European Cooperation in Science and Technology (E-COST) for support via Grants No. E-COST-GRANT-CA16218-5759aa9b and No. E-COST-GRANT-CA16218-46e403c7. B.B. and S.L.C. acknowledge financial support by the Vienna Doctoral School in Physics (VDSP). S.L.C. thanks the Austrian Science Fund (FWF) for funding via Grant no. I 4889-N (CurviMag). S.O.S. acknowledges the OeAD (Austria's Agency for Education and Internationalisation) for support through the Ernst Mach Grant MPC-2022-03823, EM UKR/Batch II. M.Yu.M. acknowledges the Wolfgang Pauli Institute (WPI) Vienna for the scholarship within the framework of the Pauli Ukraine Project, the scholarship from the Krzysztof Skubiszewski Foundation, and the IEEE Magnetics Society for support via the STCU Project no. 9918. This research is funded in whole, or in part, by the Austrian Science Fund (FWF), Grant nos. I 6079-N (FluMag) and I 4865-N (FluxPin). Support by E-COST via COST Actions CA19108 (HiSCALE) and CA21144 (SuperQuMap) is gratefully acknowledged.

ÖFOS 2012

103033 Supraleitung

Zugriff auf Dokument

10.1002/pssr.202200513Lizenz: CC BY 4.0

https://phaidra.univie.ac.at/o:1953422Lizenz: CC BY 4.0

Andere Dateien und Links

Verknüpfung zur Publikation in Scopus

1 Laufend
2 Abgeschlossen

Verlustarme Strom- und Flussquanten-geregelte Magnonik
Dobrovolskiy, O. (Projektleiter*in)
1/01/23 → 31/12/25
Projekt: Forschungsförderung
CurviMag: Krümmungsinduzierte Effekte in magnetischen Nanostrukturen
Dobrovolskiy, O. (Projektleiter*in) & Chumak, A. (Wissenschaftliche*r Projektmitarbeiter*in)
1/01/21 → 31/12/23
Projekt: Forschungsförderung
FLUXPIN: Manipulation von Fluxonen mittels nanoskalierter Haftgitter
Lang, W. (Projektleiter*in), Pedarnig, J. D. (Kooperationspartner*in), Koelle, D. (Kooperationspartner*in), Misko, V. R. (Kooperationspartner*in) & Suderow, H. (Kooperationspartner*in)
1/10/20 → 30/09/24
Projekt: Forschungsförderung

Zitationsweisen

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title = "Vortex Chains and Vortex Jets in MoSi Microbridges",

abstract = "Superconducting bridges exhibit many properties of a Josephson junction, such as the electromagnetic radiation at overcritical currents I > Ic and steps in the microwave-irradiated current–voltage (I–V ) curves. These Josephson effects stem from the periodic motion of magnetic flux quanta (vortices) in the narrowest region of the bridge. According to the Aslamazov and Larkin (AL) theory, the I–V curve of such a constriction should exhibit voltage kinks each time the number of vortices in the 1D vortex chain is increased by one. However, in the presence of defects and fluctuations, the intervortex repulsion stipulates the formation of a 2D vortex jet, which goes beyond the 1D AL model. Here, by milling one or two slits across a MoSi thin strip, we make vortices to move in a vortex–jet or a vortex–chain fashion, respectively. Unexpectedly, for the strip with a vortex jet, we observe equidistant voltage kinks at transport currents I ≃ 2Ic which are rather far from the assumption of I \textasciitilde{} Ic in the AL model. At the moment, we have no explanation for this observation, tending to attribute it to fast relaxation processes in MoSi and looking forward for a comparison with other superconducting materials.",

keywords = "Josephson junction, flux–flow instability, nanofabrication, superconductivity, vortex matter",

author = "Bevz, \{Volodymyr M.\} and Barbora Budinska and Sebastian Lamb-Camarena and Shpilinska, \{Stanislava O.\} and Clemens Schmid and \{Yu. Mikhailov\}, Mikhail and Wolfgang Lang and Dobrovolskiy, \{Oleksandr V.\}",

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AU - Bevz, Volodymyr M.

AU - Budinska, Barbora

AU - Lamb-Camarena, Sebastian

AU - Shpilinska, Stanislava O.

AU - Schmid, Clemens

AU - Yu. Mikhailov, Mikhail

AU - Lang, Wolfgang

AU - Dobrovolskiy, Oleksandr V.

PY - 2023/11

Y1 - 2023/11

N2 - Superconducting bridges exhibit many properties of a Josephson junction, such as the electromagnetic radiation at overcritical currents I > Ic and steps in the microwave-irradiated current–voltage (I–V ) curves. These Josephson effects stem from the periodic motion of magnetic flux quanta (vortices) in the narrowest region of the bridge. According to the Aslamazov and Larkin (AL) theory, the I–V curve of such a constriction should exhibit voltage kinks each time the number of vortices in the 1D vortex chain is increased by one. However, in the presence of defects and fluctuations, the intervortex repulsion stipulates the formation of a 2D vortex jet, which goes beyond the 1D AL model. Here, by milling one or two slits across a MoSi thin strip, we make vortices to move in a vortex–jet or a vortex–chain fashion, respectively. Unexpectedly, for the strip with a vortex jet, we observe equidistant voltage kinks at transport currents I ≃ 2Ic which are rather far from the assumption of I ~ Ic in the AL model. At the moment, we have no explanation for this observation, tending to attribute it to fast relaxation processes in MoSi and looking forward for a comparison with other superconducting materials.

AB - Superconducting bridges exhibit many properties of a Josephson junction, such as the electromagnetic radiation at overcritical currents I > Ic and steps in the microwave-irradiated current–voltage (I–V ) curves. These Josephson effects stem from the periodic motion of magnetic flux quanta (vortices) in the narrowest region of the bridge. According to the Aslamazov and Larkin (AL) theory, the I–V curve of such a constriction should exhibit voltage kinks each time the number of vortices in the 1D vortex chain is increased by one. However, in the presence of defects and fluctuations, the intervortex repulsion stipulates the formation of a 2D vortex jet, which goes beyond the 1D AL model. Here, by milling one or two slits across a MoSi thin strip, we make vortices to move in a vortex–jet or a vortex–chain fashion, respectively. Unexpectedly, for the strip with a vortex jet, we observe equidistant voltage kinks at transport currents I ≃ 2Ic which are rather far from the assumption of I ~ Ic in the AL model. At the moment, we have no explanation for this observation, tending to attribute it to fast relaxation processes in MoSi and looking forward for a comparison with other superconducting materials.

KW - Josephson junction

KW - flux–flow instability

KW - nanofabrication

KW - superconductivity

KW - vortex matter

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M3 - Article

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ER -

Vortex Chains and Vortex Jets in MoSi Microbridges

Abstract

Fördermittel

ÖFOS 2012

Zugriff auf Dokument

Andere Dateien und Links

Fingerprint

Projekte

Verlustarme Strom- und Flussquanten-geregelte Magnonik

CurviMag: Krümmungsinduzierte Effekte in magnetischen Nanostrukturen

FLUXPIN: Manipulation von Fluxonen mittels nanoskalierter Haftgitter

Zitationsweisen