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Title: Search for the magnetic monopole at a magnetoelectric surface
Authors: Meier, Q.N.
Fechner, M.
Nozaki, T.
Sahashi, M.
Salman, Z.
Prokscha, T.
Suter, A.
Schoenherr, P.
Lilienblum, M.
Borisov, Pavel
Dzyaloshinskii, I.E.
Fiebig, M.
Luetkens, H.
Spaldin, N.A.
Issue Date: 2019
Publisher: American Physical Society (APS)
Citation: MEIER, Q.N. ... et al, 2019. Search for the magnetic monopole at a magnetoelectric surface. Physical Review X, 9 (1), 011011.
Abstract: We show, by solving Maxwell’s equations, that an electric charge on the surface of a slab of a linear magnetoelectric material generates an image magnetic monopole below the surface provided that the magnetoelectric has a diagonal component in its magnetoelectric response. The image monopole, in turn, generates an ideal monopolar magnetic field outside of the slab. Using realistic values of the electric and magnetic field susceptibilities, we calculate the magnitude of the effect for the prototypical magnetoelectric material Cr2O3. We use low-energy muon spin rotation to measure the strength of the magnetic field generated by charged muons as a function of their distance from the surface of a Cr2O3 film and show that the results are consistent with the existence of the monopole. We discuss other possible routes to detecting the monopolar field, and show that, while the predicted monopolar field generated by Cr2O3 is above the detection limit for standard magnetic force microscopy, the detection of the field using this technique is prevented by surface charging effects.
Description: This is an Open Access Article. It is published by the American Physical Society under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Version: Published
DOI: 10.1103/physrevx.9.011011
URI: https://dspace.lboro.ac.uk/2134/36701
Publisher Link: https://doi.org/10.1103/physrevx.9.011011
Appears in Collections:Published Articles (Physics)

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