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Magnetic Transport in Spin Antiferromagnets for Spintronics Applications
Version 1
: Received: 7 September 2017 / Approved: 8 September 2017 / Online: 8 September 2017 (04:25:20 CEST)
A peer-reviewed article of this Preprint also exists.
Azzouz, M. Magnetic Transport in Spin Antiferromagnets for Spintronics Applications. Symmetry 2017, 9, 225. Azzouz, M. Magnetic Transport in Spin Antiferromagnets for Spintronics Applications. Symmetry 2017, 9, 225.
Abstract
Had magnetic monopoles been ubiquitous as electrons do, we would have probably had a different form of matter, and power plants based on currents of these magnetic charges would have been a familiar scene of modern technology. Magnetic dipoles do exist however, and in principle one could wonder if we can use them to generate magnetic currents. In the present work, we discuss the issue of generating magnetic currents and magnetic thermal currents in electrically-insulating low-dimensional Heisenberg antiferromagnets by invoking the (broken) electricity-magnetism duality symmetry. The ground state of these materials is a spin-liquid state that can be described well via the Jordan-Wigner fermions, which permit an easy definition of the magnetic particle and thermal currents. The spin-liquid states in these antiferromagnets are either gapless or gapped liquids of spinless fermions whose flow defines a current just as the one defined for electrons in a Fermi liquid. The driving force for the magnetic current is a magnetic field with a gradient along the magnetic conductor. The present work is about claiming that what the experiments in spintronics attempt to do is trying to treat the magnetic degrees of freedoms on the same footing as the electronic ones.
Keywords
duality symmetry; magnetic conductivity; magnetic thermal conductivity; spintronics; spin liquids; quantum antiferromagnets
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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