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Related Experiment Videos

Persistent spin currents without spin-orbit coupling in a spin-1/2 ring.

D Schmeltzer1, A Saxena, A R Bishop

  • 1Department of Physics, City College of the City University of New York, New York, New York 10031, USA. david@sci.ccny.cuny.edu

Physical Review Letters
|August 11, 2005
PubMed
Summary
This summary is machine-generated.

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A spatially dependent magnetic field induces persistent spin currents in antiferromagnetic rings. The spin current

Area of Science:

  • Condensed matter physics
  • Quantum magnetism

Background:

  • Spin currents are fundamental to spintronics.
  • Controlling spin currents in magnetic systems is crucial for device applications.

Purpose of the Study:

  • To investigate the induction of persistent spin currents in a spin-1/2 Heisenberg antiferromagnetic ring.
  • To determine the factors influencing the magnitude of the induced spin current.

Main Methods:

  • Theoretical analysis of a spin-1/2 Heisenberg antiferromagnetic ring model.
  • Inclusion of a spatially dependent magnetic field.

Main Results:

  • A persistent spin current can be induced by a spatially dependent magnetic field.
  • The induced spin current is directly proportional to the solid angle of the magnetic field.

Related Experiment Videos

  • Spin current magnitude depends on the ratio of exchange interactions (J(parallel)/J(perpendicular)) and magnetic field strength.
  • Conclusions:

    • Spatially dependent magnetic fields offer a novel mechanism for generating persistent spin currents.
    • The findings provide insights into the control of spin dynamics in magnetic nanostructures.