Unusual Hall effect anomaly in MnSi under pressure

We report the observation of a highly unusual Hall current in the helical magnet MnSi in an applied pressure P=6-12 kbars. The Hall conductivity displays a distinctive stepwise field profile quite unlike any other Hall response observed in solids. We identify the origin of this Hall current with the...

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Bibliographic Details
Published inPhysical review letters Vol. 102; no. 18; p. 186601
Main Authors Lee, Minhyea, Kang, W, Onose, Y, Tokura, Y, Ong, N P
Format Journal Article
LanguageEnglish
Published United States 08.05.2009
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Summary:We report the observation of a highly unusual Hall current in the helical magnet MnSi in an applied pressure P=6-12 kbars. The Hall conductivity displays a distinctive stepwise field profile quite unlike any other Hall response observed in solids. We identify the origin of this Hall current with the effective real-space magnetic field due to chiral spin textures, which may be a precursor of the partial-order state at P>14.6 kbar. We discuss evidence favoring the chiral spin mechanism for the origin of the observed Hall anomaly.
ISSN:0031-9007
DOI:10.1103/physrevlett.102.186601