We investigate the topological Hall effect (THE) in the monoaxial chiral
crystal GdPt2​B, a recently discovered compound that exhibits putative
helimagnetism below 87 K. The distinct THE was observed in GdPt2B in the
magnetically ordered state. The scaling relations for anomalous and topological
Hall conductivities differed from those of conventional models based on the
scattering process. We further demonstrate the clear scaling behavior of the
THE in a wide temperature range, which we attribute to the monoaxial
Dzyaloshinskii-Moriya (DM) interaction under external magnetic fields
perpendicular to the screw axis. The THE induced by the monoaxial DM
interaction as well as the THE in a monoaxial chiral crystal of f-electron
system are demonstrated in this study.Comment: 6 pages, 4 figures. To be published in Phys. Rev.