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Anti-ordinary Hall effect near the ferromagnetic quantum phase transition in NixPt1-x thin films
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2013 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 87, no 10, 104407- p.Article in journal (Refereed) Published
Abstract [en]

We study the Hall effect in NixPt1-x thin films. It is observed that the ordinary Hall coefficient is always negative (electron-like). The anomalous Hall coefficient is also negative, except in the vicinity of the ferromagnetic quantum phase transition, where it exhibits a sign reversal and turns positive (hole-like). This leads to an "anti-ordinary" Hall effect with opposite signs of ordinary and anomalous contributions. It clearly shows that the anomalous Hall effect does not reflect the overall topology of the Fermi surface (which remains unchanged), but originates from singular hot spots. We attribute the anti-ordinary contribution to the intrinsic (Berry-phase) origin and propose a spectroscopic explanation of its tunability as a function of temperature and composition. 

Place, publisher, year, edition, pages
2013. Vol. 87, no 10, 104407- p.
National Category
Natural Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-198386DOI: 10.1103/PhysRevB.87.104407ISI: 000316379600002OAI: oai:DiVA.org:uu-198386DiVA: diva2:616183
Available from: 2013-04-15 Created: 2013-04-15 Last updated: 2017-12-06Bibliographically approved

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Svedlindh, Peter

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