Unusual Hall Effect Anomaly in MnSi under Pressure
Unusual Hall Effect Anomaly in MnSi under Pressure
复制标题
DOI：
10.1103/physrevlett.102.186601
复制
发表时间：
2009-05-08
影响因子：
8.6
通讯作者：
Ong, N. P.
中科院分区：
文献类型：
--
作者：
Lee, Minhyea;Kang, W.;Ong, N. P.
我们报告了一个非常不寻常的霍尔电流在螺旋磁铁MnSi在施加的压力P=6-12千巴的观察。霍尔电导率显示出一个独特的逐步场的轮廓完全不同于任何其他霍尔响应观察到的固体。我们确定了这个霍尔电流的起源与由于手征自旋纹理，这可能是在P > 14.6 kbar的部分有序状态的前体的有效实空间磁场。我们讨论的证据有利于手征自旋机制的起源所观察到的霍尔异常。
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.