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Related Concept Videos

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Unconventional Hall Effect in Gapless Superconductors: Transverse Supercurrent Converted from Normal Current.

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Researchers discovered a new superconducting Hall effect (ScHE) in gapless superconductors. This effect converts a longitudinal current into a transverse supercurrent without a phase transition, offering new avenues for dissipationless electronics.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Phenomena

Background:

  • Superconducting states in proximitized normal metals exhibit anisotropic gapless behavior.
  • Segmented Fermi surfaces characterize these gapless superconducting states.

Purpose of the Study:

  • To investigate the unconventional Hall effect in gapless superconductors.
  • To demonstrate the existence and origin of the superconducting Hall effect (ScHE).

Main Methods:

  • Thermodynamic approach for bulk systems.
  • Quantum transport theory for a four-probe setup.
  • Analysis of quasiparticle Berry curvature.

Main Results:

  • An unconventional Hall effect, the ScHE, is demonstrated in gapless superconductors.
  • Longitudinal quasiparticle current is converted into a transverse supercurrent without a phase transition.
  • The ScHE originates from the quasiparticle Berry curvature.

Conclusions:

  • The ScHE is an intrinsic property of gapless superconductors enabled by their anisotropic phase.
  • Experimental verification is proposed using materials like Bi_{2}Te_{3}/NbSe_{2} and altermagnetic heterostructures.