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Magnetic-field-induced chiral hidden order in URu2Si2
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2014 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 94, no 32-33, 3789-3802 p.Article in journal (Refereed) Published
Abstract [en]

Two of the most striking and yet unresolved manifestations of the hidden order (HO) in [GRAPHICS] are associated, on one hand, with the double-step metamagnetic transitions and, on the other, with the giant anomalous Nernst signal. Both are observed when a magnetic field is applied along the [GRAPHICS] -axis. Here, we provide for the first time a unified understanding of these puzzling phenomena and the related field-temperature ( [GRAPHICS] ) phase diagram. We demonstrate that the HO phase at finite fields can be explained with a chiral [GRAPHICS] spin density wave, assuming that the zero-field HO contains only the time-reversal symmetry preserving [GRAPHICS] component. We argue that the presence of the field-induced chiral HO can be reflected in a distinctive non-linear [GRAPHICS] dependence of the Kerr angle, when a Kerr experiment is conducted for finite fields. This fingerprint can be conclusive for the possible emergence of chirality in the HO.

Place, publisher, year, edition, pages
2014. Vol. 94, no 32-33, 3789-3802 p.
Keyword [en]
anomalous Nernst effect, polar Kerr effect, chirality, URu2Si2, hidden order, itinerant metamagnetism
National Category
Condensed Matter Physics
URN: urn:nbn:se:uu:diva-239767DOI: 10.1080/14786435.2014.909614ISI: 000345384200013OAI: oai:DiVA.org:uu-239767DiVA: diva2:775271
Available from: 2014-12-31 Created: 2014-12-30 Last updated: 2014-12-31Bibliographically approved

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Aperis, Alex
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