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Designing Lattice Spin Models and Magnon Gaps with Supercurrents.

Johanne Bratland Tjernshaugen1, Martin Tang Bruland1, Jacob Linder1

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This summary is machine-generated.

Researchers demonstrate electric control of spin lattices and magnon gaps using supercurrents. This breakthrough enables tunable magnetic interactions and controlled magnon gaps without dissipative currents, advancing quantum applications.

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Area of Science:

  • Condensed matter physics
  • Quantum information science
  • Spintronics

Background:

  • Electric control of magnetic interactions is crucial for quantum technologies like qubits and memory.
  • Current methods often rely on dissipative currents, posing limitations.

Purpose of the Study:

  • To investigate the control of spin lattices and magnon gaps using supercurrents.
  • To explore novel methods for electric control of magnetic interactions without dissipation.

Main Methods:

  • Theoretical modeling of spin-polarized supercurrents interacting with magnetic adatoms on superconductors.
  • Analysis of spin lattice properties and magnon gap modulation in magnetic insulators.

Main Results:

  • Supercurrents enable electric control over spin lattices, making interactions dependent on absolute adatom positions.
  • Tunable noncollinear ground states and controlled magnon gaps in antiferromagnetic and altermagnetic insulators were achieved.
  • Demonstrated spin switching and magnon gap control without dissipative currents.

Conclusions:

  • Supercurrents offer a dissipationless pathway for electric control of magnetism at the quantum level.
  • This provides a practical platform for studying spin Hamiltonians and developing advanced quantum devices.