Department of Basic Sciences, Kyushu Institute of Technology, Kitakyushu, Japan.
Phys Rev Lett. 2011 Jul 1;107(1):017205. doi: 10.1103/PhysRevLett.107.017205.
We consider magnetotransport properties in a conducting chiral helimagnet, where the magnetic kink crystal (MKC) is formed under weak magnetic field applied perpendicular to the helical axis. The MKC behaves as a magnetic superlattice potential and results in Bragg scattering of conduction electrons. Tuning of the weak magnetic field enables us to control the size of the superlattice Brillouin zone and gives rise to a series of divergent resistivity anomalies originating from resonant Bragg scatterings. We discuss as well a nontrivial magnetic structure in the resonant states realized in the subsystem of the itinerant electrons.
我们研究了在弱磁场下沿螺旋轴垂直施加时形成磁扭结晶体（MKC）的手性螺旋磁体中的输运性质。MKC 表现为磁超晶格势，导致传导电子的布拉格散射。通过调节弱磁场，我们能够控制超晶格布里渊区的大小，并产生一系列源于共振布拉格散射的发散电阻率异常。我们还讨论了在巡游电子子系统中实现的共振态中的非平凡磁结构。
