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20 August 2020 Antiferromagnetic order and magnetoelectricity of 2D charge carriers
Roland Winkler, Ulrich Zuelicke
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Proceedings Volume 11470, Spintronics XIII; 114702L (2020) https://doi.org/10.1117/12.2566086
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Ordinary materials react to an electric field by generating an electrical polarization, and a magnetic field normally generates a magnetization. In magnetoelectric media, this conventional scheme is turned upside-down: an electric polarization is induced by a magnetic field and a magnetization results from an electric field. We develop a detailed theory for how this effect comes about in materials nanostructured into ultra-thin conducting sheets. Such quantum wells are found to exhibit a sizable magnetoelectric effect that could enable novel device applications. Antiferromagnetic order plays a central role in our theory. We reveal magnetic order in quantum-well structures to arise from dissipationless equilibrium currents. In the magnetoelectric effect, an electric field manipulates the antiferromagnetic currents such that they give rise to a macroscopic net magnetization. Our theory provides new avenues for pursuing antiferromagnetic spintronics as a post-silico electronics paradigm.
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Roland Winkler and Ulrich Zuelicke "Antiferromagnetic order and magnetoelectricity of 2D charge carriers", Proc. SPIE 11470, Spintronics XIII, 114702L (20 August 2020); https://doi.org/10.1117/12.2566086
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KEYWORDS
Magnetism
Ferromagnetics
Diamond
Space operations
Polarization
Solids
Thermodynamics
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