title: Unusual Hall effect anomaly in MnSi under pressure.
abstract: 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.
authors.affiliation: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Minhyea
authors.initials: M
authors.lastname: Lee
authors.forename: W
authors.initials: W
authors.lastname: Kang
authors.forename: Y
authors.initials: Y
authors.lastname: Onose
authors.forename: Y
authors.initials: Y
authors.lastname: Tokura
authors.forename: N P
authors.initials: NP
authors.lastname: Ong