Linear Magnetoelectric Effect by Orbital Magnetism
نویسندگان
چکیده
منابع مشابه
Linear magnetoelectric effect by orbital magnetism.
We use symmetry analysis and first-principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an applied electric field. Using LiFePO(4) as a model compound we show that spin-orbit coupling partially lifts the quenching of the 3d orbitals and causes small orbital magnetic moments (μ((L)) ...
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We extend the band theory of linear orbital magnetoelectric coupling to treat crystals under finite electric fields. Previous work established that the orbital magnetoelectric response of a generic insulator at zero field comprises three contributions that were denoted as local circulation, itinerant circulation, and Chern-Simons. We find that the expression for each of them is modified by the ...
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Magnetoelectric responses are a fundamental characteristic of materials that break time-reversal and inversion symmetries notably multiferroics and, remarkably, of “topological insulators” in which those symmetries are unbroken. Previous work has shown how to compute spin and lattice contributions to the magnetoelectric tensor. Here we solve the problem of orbital contributions by computing the...
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The discrepancy seen in the experimental and theoretical results on the magnetic moment of a small magnetic cluster has been attributed to the contribution arising from orbital magnetism. In this Letter we show that the magnetic states with large orbital magnetic moment are not always energetically favorable; they could, however, be realizable by coating the cluster or deposing it on appropriat...
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V. Dyadkin,1,2,* K. Prša,3 S. V. Grigoriev,2,4 J. S. White,3,5 P. Huang,3 H. M. Rønnow,3 A. Magrez,6 C. D. Dewhurst,7 and D. Chernyshov1 1Swiss-Norwegian Beamlines at the European Synchrotron Radiation Facility, 38000 Grenoble, France 2Petersburg Nuclear Physics Institute, 188300 Gatchina, Saint Petersburg, Russia 3Laboratory for Quantum Magnetism, Ecole Polytechnique Fédérale de Lausanne (EPFL...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.109.197203