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.

引用

页数：4

共 27 条

[1]

[Anonymous], 1985, SPRINGER SERIES SOLI

[2] Chirality induced anomalous-Hall effect in helical spin crystals [J].