Unusual Hall Effect Anomaly in MnSi under Pressure

被引：354
作者：
Lee, Minhyea [1 ]
Kang, W. [2 ]
Onose, Y. [3 ]
Tokura, Y. [3 ,4 ]
Ong, N. P. [1 ]
机构：
[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
[4] SSS, JST, ERATO, Tsukuba, Ibaraki 3058562, Japan
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 18期
基金：
美国国家科学基金会;
关键词：
ITINERANT FERROMAGNET MNSI; BERRY-PHASE; MAGNETORESISTANCE; CHIRALITY; CRYSTALS; DYNAMICS;
D O I：
10.1103/PhysRevLett.102.186601
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页数：4
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