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  • Iguchi, Yusuke, et al. (author)
  • Superconducting vortices carrying a temperaturedependent fraction of the flux quantum
  • 2023
  • In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 380:6651, s. 1244-1247
  • Journal article (peer-reviewed)abstract
    • Magnetic field penetrates type-II bulk superconductors by forming quantum vortices that enclose a magnetic flux equal to the magnetic flux quantum. The flux quantum is a universal quantity that depends only on fundamental constants. In this study, we investigated isolated vortices in the hole-overdoped Ba1?xKxFe2As2 (x = 0.77) by using scanning superconducting quantum interference device (SQUID) magnetometry. In many locations, we observed objects that carried only part of a flux quantum, with a magnitude that varied continuously with temperature. We demonstrated mobility and manipulability of these objects and interpreted them as quantum vortices with nonuniversally quantized (fractional) magnetic flux whose magnitude is determined by the temperature-dependent parameters of a multicomponent superconductor.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Babaev, Egor (1)
Barkman, Mats (1)
Benfenati, Andrea (1)
Grinenko, Vadim (1)
Kihou, Kunihiro (1)
Lee, Chul-Ho (1)
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Iguchi, Yusuke (1)
Shi, Ruby A. (1)
Moler, Kathryn A. (1)
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University
Royal Institute of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2023 (1)

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