Publication detail

Vortex Counting and Velocimetry for Slitted Superconducting Thin Strips

Bevz, VM. Mikhailov, MY. Budinska, B. Lamb-Camarena, S. Shpilinska, SO. Chumak, AV. Urbanek, M. Arndt, M. Lang, W. Dobrovolskiy, OV.

Original Title

Vortex Counting and Velocimetry for Slitted Superconducting Thin Strips

Type

journal article in Web of Science

Language

English

Original Abstract

The maximal speed v* for magnetic flux quanta is determined by the energy relaxation of unpaired electrons and is thus essential for superconducting microstrip single-photon detectors (SMSPDs). However, the deduction of v* from the current-voltage (I-V) curves at zero magnetic field is hindered by the unknown number of vortices, nv, as a small number of fast-moving vortices can induce the same voltage as a large number of slow-moving ones. Here, we introduce an approach for the quantitative determination of nv and v*. The idea is based on the Aslamazov and Larkin prediction of kinks in the I-V curves of wide and short superconducting constrictions when the number of fluxons crossing the constriction is increased by one. We realize such conditions in wide MoSi thin strips with slits milled by a focused ion beam and reveal quantum effects in a macroscopic system. By observing kinks in the I-V curves with increase of the transport current, we evidence a crossover from a single- to multifluxon dynamics and deduce v* ' 12 km/s. Our experimental observations are augmented with numerical modeling results, which reveal a transition from a vortex chain over a vortex jet to a vortex river with increase of nv and v. Our findings are essential for the development of one-dimensional and two-dimensional few-fluxon devices and provide a demanded approach for the deduction of maximal vortex velocities at the SMSPD operation conditions.

Keywords

INSTABILITY; PARTICLE; MOTION

Authors

Bevz, VM.; Mikhailov, MY.; Budinska, B.; Lamb-Camarena, S.; Shpilinska, SO.; Chumak, AV.; Urbanek, M.; Arndt, M.; Lang, W.; Dobrovolskiy, OV.

Released

30. 3. 2023

Publisher

AMER PHYSICAL SOC

Location

COLLEGE PK

ISBN

2331-7019

Periodical

Physical Review Applied

Year of study

19

Number

3

State

United States of America

Pages count

11

URL

https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.19.034098

BibTex

@article{BUT184147,
  author="Bevz, VM. and Mikhailov, MY. and Budinska, B. and Lamb-Camarena, S. and Shpilinska, SO. and Chumak, AV. and Urbanek, M. and Arndt, M. and Lang, W. and Dobrovolskiy, OV.",
  title="Vortex Counting and Velocimetry for Slitted Superconducting Thin Strips",
  journal="Physical Review Applied",
  year="2023",
  volume="19",
  number="3",
  pages="11",
  doi="10.1103/PhysRevApplied.19.034098",
  issn="2331-7019",
  url="https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.19.034098"
}