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 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.
Lee
Minhyea
M
Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Kang
W
W
Onose
Y
Y
Tokura
Y
Y
Ong
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NP