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Influence of Magnetic Field on Surface Andreev Bound States in Superfluid 3He-B Studied by Mobility of Electron Bubble.

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Title: Influence of Magnetic Field on Surface Andreev Bound States in Superfluid 3He-B Studied by Mobility of Electron Bubble.
Authors: Ikegami, Hiroki1 (AUTHOR) hikegami@iphy.ac.cn, Kono, Kimitoshi2 (AUTHOR) kkono@nycu.edu.tw, Tsutsumi, Yasumasa3 (AUTHOR) y.tsutsumi@kwansei.ac.jp
Source: Journal of Low Temperature Physics. Jun2025, Vol. 219 Issue 5, p230-241. 12p.
Subjects: Electron mobility, Magnetic fields, Density of states, Free surfaces, Electron traps
Abstract: The B phase of superfluid 3 He ( 3 He-B) is topologically nontrivial, and the surface Andreev bound states formed on a surface are conceived as Majorana fermions. In a magnetic field, the surface Andreev bound states acquire a Zeeman gap. How the Zeeman gap opens when a magnetic field is applied is intimately related to how the topological properties are lost. In this article, we study the mobility of an electron bubble trapped under a free surface of 3 He-B in a magnetic field of 0.25 T to examine the influence of the magnetic field on the surface Andreev bound states. We observe experimentally and theoretically that, with decreasing temperature, the mobility at 0.25 T increases steeper than that in zero magnetic field when the thermal energy is comparable to the Zeeman energy, while the mobility is slightly smaller than that in zero magnetic field at higher temperatures. These features are understood by the opening of the Zeeman gap, the resulting change in the density of states within the bulk superfluid gap, and the distortion of the bulk superfluid gap by the magnetic field. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Influence of Magnetic Field on Surface Andreev Bound States in Superfluid 3He-B Studied by Mobility of Electron Bubble.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Low+Temperature+Physics%22">Journal of Low Temperature Physics</searchLink>. Jun2025, Vol. 219 Issue 5, p230-241. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Electron+mobility%22">Electron mobility</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Density+of+states%22">Density of states</searchLink><br /><searchLink fieldCode="DE" term="%22Free+surfaces%22">Free surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+traps%22">Electron traps</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The B phase of superfluid 3 He ( 3 He-B) is topologically nontrivial, and the surface Andreev bound states formed on a surface are conceived as Majorana fermions. In a magnetic field, the surface Andreev bound states acquire a Zeeman gap. How the Zeeman gap opens when a magnetic field is applied is intimately related to how the topological properties are lost. In this article, we study the mobility of an electron bubble trapped under a free surface of 3 He-B in a magnetic field of 0.25 T to examine the influence of the magnetic field on the surface Andreev bound states. We observe experimentally and theoretically that, with decreasing temperature, the mobility at 0.25 T increases steeper than that in zero magnetic field when the thermal energy is comparable to the Zeeman energy, while the mobility is slightly smaller than that in zero magnetic field at higher temperatures. These features are understood by the opening of the Zeeman gap, the resulting change in the density of states within the bulk superfluid gap, and the distortion of the bulk superfluid gap by the magnetic field. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1007/s10909-024-03255-2
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 230
    Subjects:
      – SubjectFull: Electron mobility
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Density of states
        Type: general
      – SubjectFull: Free surfaces
        Type: general
      – SubjectFull: Electron traps
        Type: general
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      – TitleFull: Influence of Magnetic Field on Surface Andreev Bound States in Superfluid 3He-B Studied by Mobility of Electron Bubble.
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            NameFull: Ikegami, Hiroki
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            NameFull: Kono, Kimitoshi
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            NameFull: Tsutsumi, Yasumasa
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            – D: 01
              M: 06
              Text: Jun2025
              Type: published
              Y: 2025
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              Value: 219
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